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problems creating read-only, 'consumer' dirsrv replica
by Jon Detert 16 Mar '11

16 Mar '11

Hello, I am trying to deploy an additional read-only replica (aka. 'consumer') in a single-master dirsrv environment. The master, and the other pre-existing consumer servers, are all 'fedora-ds' running on Fedora 7. I'm trying to add a consumer running on Centos 5.5. Ultimately, I intend to replace the Fedora ds servers with Centos dirsrv servers. I'm trying to deploy the Centos dirsrv consumer without running the dirsrv-admin. I've been following the directions at http://docs.redhat.com/docs/en-US/Red_Hat_Directory_Server/8.1/html/Adminis… , specifically in chapter 8. When I get to "8.7.2. Configuring Consumers from the Command Line" ( http://docs.redhat.com/docs/en-US/Red_Hat_Directory_Server/8.1/html/Adminis… ), I run into problems: 1) ldapmodify complains that I'm missing the required attribute 'nsds5replicaId'. So I add it, and guess at the replicaID number (cuz the guide says nothing about the ID). 2) even after resolving issue 1) above, I get an error: "ldap_add: No such object" The return value of the ldapmodify command is 32. The changetype of the operation is 'add', so ldapmodify knows it's trying to add an object. The input I pass to ldapmodify is just like shown in the guide, but w. the addition of the nsds5replicaId attribute mentioned in issue 1) above: dn: cn=replica,cn="dc=infinityhealthcare,dc=com",cn=mapping tree,cn=config changetype: add objectclass: top objectclass: nsds5replica objectclass: extensibleObject cn: replica nsds5replicaroot: dc=infinityhealthcare,dc=com nsds5replicatype: 2 nsDS5ReplicaId: 65535 nsds5ReplicaBindDN: uid=RManager,cn=config nsds5flags: 0 Any idea what's wrong? Do I have to first create dn: cn="dc=infinityhealthcare,dc=com",cn=mapping tree,cn=config ? If so, how? The guide doesn't seem to have a step for that, except for when adding a 'hub' dirsrv. However, I mean to add a 'consumer', not a 'hub'. Thanks, Jon

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install specific version using yum
by Tim Dunphy 16 Mar '11

16 Mar '11

Hello list! I have been instructed to install very specific version numbers of httpd and php on the company web servers. Here's what I've tried so far [root@ec2-50-17-114-126 ~]# yum install php-5.2.17-1.w5.i386 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: yum.singlehop.com * base: mirror.rackspace.com * epel: nas1.itc.virginia.edu * extras: centos.supsec.org * updates: pubmirrors.reflected.net Setting up Install Process No package php-5.2.17-1.w5.i386 available. Error: Nothing to do [root@ec2-50-17-114-126 ~]# yum install php-5.2.17-1.w5 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: yum.singlehop.com * base: mirror.rackspace.com * epel: nas1.itc.virginia.edu * extras: centos.supsec.org * updates: pubmirrors.reflected.net Setting up Install Process No package php-5.2.17-1.w5 available. Error: Nothing to do [root@ec2-50-17-114-126 ~]# yum install php-5.2.17 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: yum.singlehop.com * base: mirror.rackspace.com * epel: nas1.itc.virginia.edu * extras: centos.supsec.org * updates: pubmirrors.reflected.net Setting up Install Process No package php-5.2.17 available. I was wondering if someone would mind sharing the best way to do this? thanks!! tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

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Re: [CentOS] Mumble gamers' VOIP server (murmur)
by Michael Simpson 15 Mar '11

15 Mar '11

On 13 March 2011 09:03, Kenneth Porter <shiva(a)sewingwitch.com> wrote: > I found a bug in the RPM: /etc/murmur needs to be owned by > mumble-server.mumble-server so that it can write to its sqlite DB. There is a great write up in the section "tips and tricks" on the mumble website for installing it on CentOS google knows about it it involves using the static build from sourceforge and extracting the conf and init files from the mandriva rpm then adding the necessary group and user works a treat and "free-er" than teamspeak 3 mike

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Swap space for kvm virtual host
by Nataraj 15 Mar '11

15 Mar '11

I have a kvm virtual host running on what will become CentOS 6 with 12GB of memory and a Quad Xeon X5560 2.8Ghz . The store for virtual machines will be a software raid 6 array of 6 disks with an LVM layered on top. I'm not initially planning any major overcommitment of resources, though there could be a need for some overcommitment with a light workload on the guests. In recent years people seem to configure a wide range of different swap allocations. I was thinking initially to spread swap across seperate non-raid partitions on 4 of these disks, but the downside of that is if I put 2gb on each disk, then I can only swap processes that will fit in 2gb swap space. Also, if one of the disks fails, I have to reboot if anything was swapped to that drive. My questions are as follows: 1. What experience are others having with putting swap space on raid partitions? I was thinking about maybe swapping on a raid10 device, otherwise an LVM spanning multiple drives. 2. In practice, what kinds of swap allocation are people finding useful for a kvm virtual host of this size? I definitely don't want a system that is so overcommited that performance is impacted, but if some overcommitment is reasonable for VM's that have light workload, then I consider that. I can increase system resources when that becomes necessary. Nataraj

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Web server becoming unresponsive : high load
by robert mena 15 Mar '11

15 Mar '11

Hi, I have a web server which is randomly becoming unresponsive. I've checked for hardware problems with no luck : - no ethernet errors - no disk errors - no memory errors So far I've managed to point the trouble at the web server since if I restart httpd (apache) it comes back to normal. This is not a shared server so I control (or at least like to think of) what is hosted so I have two suspects: a) my own code is behaving strangely. For example, a php script that in a given situation/parameters increases the usage. b) some sort of attack. Either in conjunction to a or other vulnerability. I am looking for advices in how can I pin point since looking at every line of code would be infeasible. Centos 5.5 / apache / php 5.2.10

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CentOS 5.5 php configure errors
by Ron Young 15 Mar '11

15 Mar '11

I am attempting to install odbtp on my newly created lamp server running CentOS 5.5 and php 5.2.17. The odbtp compile failed looking for lots of zend related files supposedly in the php install dir. I learned from the odbtp project forum that I need to run configure in the php source directory. So I downloaded the php 5.2.17 source and ran ./configure and got these results: root@myserver php-5.2.17]# ./configure ... checking whether to enable LIBXML support... yes checking libxml2 install dir... no checking for xml2-config path... configure: error: xml2-config not found. Please check your libxml2 installation. [root@myserver php-5.2.17]# [root@myserver php-5.2.17]# yum list libxml2 Loaded plugins: fastestmirror, replace Loading mirror speeds from cached hostfile * addons: mirrors.igsobe.com * base: mirror.cogentco.com * epel: mirror.vcu.edu * extras: mirror.ash.fastserv.com * ius: mirror.rackspace.com * updates: mirror.cogentco.com Installed Packages libxml2.i386 2.6.26-2.1.2.8.el5_5.1 installed libxml2.x86_64 2.6.26-2.1.2.8.el5_5.1 installed [root@myserver php-5.2.17]# What am I missing? Suggestions? Regards, Ron Young 919-621-9015 http://www.linkedin.com/in/ronhyoung +++++++++++++++++++ Little tiny dreams require little tiny thoughts and little tiny steps. Great big dreams require great big thoughts and little tiny steps. +++++++++++++++++++

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Re: [CentOS] CentOS Digest, Vol 72, Issue 6
by xcrossbow＠gmail.com 15 Mar '11

15 Mar '11

xxxxxxxxxx

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Re: [CentOS] Server locking up everyday around 3:30 AM
by m.roth＠5-cent.us 14 Mar '11

14 Mar '11

PJ wrote: > This may or may not be CentOS related, but am out of ideas at this point and wanted to bounce this off the list. > > I'm running a CentOS 5.5 server, running the latest kernel > 2.6.18-194.32.1.el5. > > Almost everyday around 3:30 AM the server completely locks up and has to be power cycled before it will come back online. > (this means someone hat to wake up and reboot the server, oh how I love being an internet janitor! :) Please log of the Internet. We are cleaning it. You may log back on later. <snip> > I was able to pull this from /var/log/messages, this happens just seconds before locking up completely... > > Mar 8 03:33:18 web1 kernel: INFO: task wget:13608 blocked for more than 120 seconds. > Mar 8 03:33:19 web1 kernel: "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > Mar 8 03:33:19 web1 kernel: wget D ffff810001004420 0 13608 13607 (NOTLB) > Mar 8 03:33:19 web1 kernel: ffff81007bc7bc78 0000000000000086 > ffff81007bc7bd88 ffff81000100d3f8 > Mar 8 03:33:19 web1 kernel: ffff81007bc7bbf0 0000000000000007 > ffff8100849db0c0 ffffffff80308b60 > Mar 8 03:33:19 web1 kernel: 00013a2964cdf439 0000000000003237 > ffff8100849db2a8 0000000064c82eae > Mar 8 03:33:19 web1 kernel: Call Trace: > Mar 8 03:33:20 web1 kernel: [<ffffffff80063c6f>] > __mutex_lock_slowpath+0x60/0x9b <snip> Anyone else smell an OOM killer? But it's clearly whatever the wget's after that's killing the system. mark

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wich filesystem to store > 250E6 small files in same or hashed dire
by Alain Spineux 14 Mar '11

14 Mar '11

Hi I need to store about 250.000.000 files. Files are less than 4k. On a ext4 (fedora 14) the system crawl at 10.000.000 in the same directory. I tried to create hash directories, two level of 4096 dir = 16.000.000 but I had to stop the script to create these dir after hours and "rm -rf" would have taken days ! mkfs was my friend I tried two levels, first of 4096 dir, second of 64 dir. The creation of the hash dir took "only" few minutes, but copying 10000 files make my HD scream for 120s ! I take only 10s when working in the same directory. The filenames are all 27 chars and the first chars can be used to hash the files. My question is : Which filesystem and how to store these files ? Regards -- Alain Spineux | aspineux gmail com Monitor your iT & Backups | http://www.magikmon.com Free Backup front-end | http://www.magikmon.com/mksbackup Your email 100% available | http://www.emailgency.com

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FTP accounts
by Huib Laurens 14 Mar '11

14 Mar '11

Hello, I have setup a centos server running 5.5 and I have a problem with the FTP settings. Currently I have two FTP accounts based on that server, they lead to: /home/bella /home/carmen Currently the FPT accounts starts in the home directory when they are logged in. But they are able to see all directories on the server. What can I do to make sure they cant come out of there home directory? -- Regards, Huib "Abigor" Laurens Support Free Knowledge: http://wikimediafoundation.org/wiki/Donate

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NFS still serving old directory after rename
by neubyr 14 Mar '11

14 Mar '11

Howdy, I have renamed a directory on NFS ver 3 server and then created a new directory again with the same name. # mv dir dir-hosed # mkdir dir The directory is auto-mounted on client side. I had unmounted directories on client side before making above changes. Now when I try to mount back 'dir', I still see old files and not new empty dir. Am I missing something here in the NFS config? Is it caching old directory contents? Any help? thanks, neuby.

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Server locking up everyday around 3:30 AM - (INFO: task wget:13608 blocked for more than 120 seconds) need sleep, help.
by PJ 14 Mar '11

14 Mar '11

This may or may not be CentOS related, but am out of ideas at this point and wanted to bounce this off the list. I'm running a CentOS 5.5 server, running the latest kernel 2.6.18-194.32.1.el5. Almost everyday around 3:30 AM the server completely locks up and has to be power cycled before it will come back online. (this means someone hat to wake up and reboot the server, oh how I love being an internet janitor! :) Smells like a hardware issue to me too, but I went through all of the dell diagnostics, updated the firmware, everything checks out as being okay, RAID, disks, RAM, etc... Spent an hour on the phone with a Dell tech. No hardware issues, at least that we were able to find. There are no cron jobs that run at 3:30, no backups, the server has a load of 0, nothing is scheduled around that time... The only crontab entry at all is "*/5 * * * * wget -q www.websitedomain.com/cron.php >/dev/null 2>&1" They are running Magento for commerce purposes and this runs every 5 minutes. Why does the server only lockup around 3:30 AM? Because it's knows I am fast asleep? I was able to pull this from /var/log/messages, this happens just seconds before locking up completely... Mar 8 03:33:18 web1 kernel: INFO: task wget:13608 blocked for more than 120 seconds. Mar 8 03:33:19 web1 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Mar 8 03:33:19 web1 kernel: wget D ffff810001004420 0 13608 13607 (NOTLB) Mar 8 03:33:19 web1 kernel: ffff81007bc7bc78 0000000000000086 ffff81007bc7bd88 ffff81000100d3f8 Mar 8 03:33:19 web1 kernel: ffff81007bc7bbf0 0000000000000007 ffff8100849db0c0 ffffffff80308b60 Mar 8 03:33:19 web1 kernel: 00013a2964cdf439 0000000000003237 ffff8100849db2a8 0000000064c82eae Mar 8 03:33:19 web1 kernel: Call Trace: Mar 8 03:33:20 web1 kernel: [<ffffffff80063c6f>] __mutex_lock_slowpath+0x60/0x9b Mar 8 03:33:20 web1 kernel: [<ffffffff80063cb9>] .text.lock.mutex+0xf/0x14 Mar 8 03:33:20 web1 kernel: [<ffffffff8000cf82>] do_lookup+0x90/0x1e6 Mar 8 03:33:20 web1 kernel: [<ffffffff8000a29c>] __link_path_walk+0xa01/0xf5b Mar 8 03:33:20 web1 kernel: [<ffffffff8000ea4b>] link_path_walk+0x42/0xb2 Mar 8 03:33:20 web1 kernel: [<ffffffff8000cd72>] do_path_lookup+0x275/0x2f1 Mar 8 03:33:23 web1 kernel: [<ffffffff80012851>] getname+0x15b/0x1c2 Mar 8 03:33:23 web1 kernel: [<ffffffff800239d1>] __user_walk_fd+0x37/0x4c Mar 8 03:33:23 web1 kernel: [<ffffffff80028905>] vfs_stat_fd+0x1b/0x4a Mar 8 03:33:23 web1 kernel: [<ffffffff80023703>] sys_newstat+0x19/0x31 Mar 8 03:33:23 web1 kernel: [<ffffffff8005d116>] system_call+0x7e/0x83 If anyone has some advice on where to go from here it would be greatly appreciated. Thanks in advance. -- PJF

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internal ip
by mattias 14 Mar '11

14 Mar '11

cool! i reinstall centos yestoday and xen and forgot to put bridge=xenbr0 in the config and my vm automaticley tooks a internal ip 192.168 something and i haven't set it in xend-config.sxp will xen not automaticley have bridge set?

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any tutorial/how to for su-exec php under selinux on centos 5?
by Eero Volotinen 14 Mar '11

14 Mar '11

Hi, Any good tutorial how to setup su-exec php unders selinux on centos 5? -- Eero

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CentOS server install
by Damien Hull 13 Mar '11

13 Mar '11

It's been a while since I've used CentOS. I'm doing a test install for a server setup. I unchecked desktop and checked server. What does server give me?

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IPC Benchmark in Centos
by Peter Penzov 13 Mar '11

13 Mar '11

Hi, I'm interested is there any benchmark tests for Centos. How fast is for example Unix domain socket and Message Queue? Regards Peter

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How to install source rpm on centos
by sync 13 Mar '11

13 Mar '11

Hi to all. I'm having a problem with the rpm command on centos 5.5; I am used to recompile a source rpm with the following command: root@test ~: rpmbuild --rebuild pssh-1.2.2-1.rf.src.rpm Installing pssh-1.2.2-1.rf.src.rpm error: cannot create %sourcedir /home/test/rpm/SOURCES error: pssh-1.2.2-1.rf.src.rpm cannot be installed Does anybody know something about that ? Thanks in advance....

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Re: [CentOS] Race condition with mdadm at boot
by Chuck Munro 13 Mar '11

13 Mar '11

On 03/12/2011 09:00 AM, compdoc wrote: >> >On the particular Supermicro motherboard I'm using, there is a very >> >long delay (10 or 15 sec) between power-on and initiation of visible >> >BIOS activity, so all disk drives have ample time to spin up and stabilize. > > Yeah, I have used Supermicro in the past and they had the same long pause > when you turn them on. Good boards, except I had one die recently. > > I was wondering how many drives total, and how many watts the PSU is? > > Also, is the controller's firmware up to date? > > I agree, Supermicro does design good boards, with a lot of server-grade features that consumer boards lack. Not cheap, but worth the money. I assume the long power-on pause is due to the BIOS silently checking RAM, with the side effect of giving the disks ample time to spin up. I have a total of 15 drives. Three of them are fast 2-1/2" drives used for the host OS filesystems, running on the ICH-10 SATA controller. No problem at all with those. The other 12 drives are 2TB WD Caviar Black series. 6 are connected to the on-board 8-port LSI 1068E chip, and 6 divided equally between 2 Tempo 'Sonnet' 4-port PCIe cards (Marvell chips). All drives have the same 8 partitions each. All drives have the same 8-partition configuration. The LSI controller supports 8 RAID-6 arrays using 5 active drives plus a hot spare. The Tempo controllers support the same arrangement using the other 6 drives. The firmware on everything is up to date. Other than the annoying failure to bind 1 or 2 random partitions on the last drive in each group of 6, the performance of this configuration is quite good. I still have the 'scsi_mod.scan=sync' kernel parameter in place, so there may be some other cause of the failure to bind some of the partitions. FWIW, in more than 10 system boots, there has never been any consistent pattern to these failures. Chuck

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Re: [CentOS] Which file system to use for a USB backup
by Earl Ramirez 13 Mar '11

13 Mar '11

For Mac he can use fuse for mac or NTFS-3G for Mac, that will give you the ability to write to ntfs drives on a Mac. http://www.macupdate.com/app/mac/23729/macfuse I use NTFS-3G for Mac and it works fine. http://sourceforge.net/projects/fuse-for-macosx/ On Sun, Mar 13, 2011 at 12:16 PM, Kenneth Porter <shiva(a)sewingwitch.com>wrote: > --On Wednesday, March 09, 2011 2:56 PM -0800 Todd Cary > <todd(a)aristesoftware.com> wrote: > > > I have some photographs on my Centos 4 server that I want to copy > > to a USB drive. However, I want to be able to access the files > > from Windows or Mac OS's. Where should I look for instructions > > on how to mount and format the USB drive and is FAT32 the only > > option? > > I don't know about Mac, but you could set up NTFS with Fuse on CentOS to > allow you to format and mount it as an NTFS filesystem. > > You could also format as ext3 and install a filesystem driver on Windows to > understand ext3. > > <http://www.fs-driver.org/> > > Since the Mac is BSD-based, it might even understand ext3. There's this > project: > > <http://ext2fsx.sourceforge.net/> > > I haven't used these, as I haven't needed to export files to another OS > this way. > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Kind Regards Earl Ramirez

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Mumble gamers' VOIP server (murmur)
by Kenneth Porter 13 Mar '11

13 Mar '11

I was unable to build the whole Mumble system on CentOS but it's available for Fedora Development. I just wanted the server part on my headless server, and a static build is available from the Mumble project on Sourceforge. So I grabbed the Mumble SRPM from Fedora Development, the static build from Sourceforge, and stripped the spec file down to the minimum needed to just install the static-build server. You'll find the result here: <http://sewingwitch.com/ken/Stuff/murmur-1.2.3-11.kp.src.rpm> If you're paranoid (a good admin should be), just unpack to use the spec file and grab the sources from Fedora Development and Sourceforge and overwrite those included in the SRPM before building.

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Which file system to use for a USB backup
by Todd Cary 13 Mar '11

13 Mar '11

I have some photographs on my Centos 4 server that I want to copy to a USB drive. However, I want to be able to access the files from Windows or Mac OS's. Where should I look for instructions on how to mount and format the USB drive and is FAT32 the only option? Many thanks -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

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Alternatives to apache for php based servers: Nginx
by robert mena 12 Mar '11

12 Mar '11

Hi, Anyone here using Nginx as alternative to apache in conjunction to php scripts? Care to share thoughts and caveats? I am reading that it is a good alternative but do not know the real life limitations, diferences to apache, which repo to fetch etc.

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try with succes rpm bind 9.7.3 with koji el4 and el5
by fakessh ＠ 12 Mar '11

12 Mar '11

rehello centos list after some modifications rpm fedora core 14 of bind-9.7.3 and patching. diff -u unpatched/configure.in patched/configure.in --- unpatched/configure.in 2010-07-05 14:02:20.000000000 +0200 +++ patched/configure.in 2010-07-05 14:03:48.000000000 +0200 @@ -282,7 +282,8 @@ AC_C_INLINE AC_C_VOLATILE AC_CHECK_FUNC(sysctlbyname, AC_DEFINE(HAVE_SYSCTLBYNAME)) -AC_C_FLEXIBLE_ARRAY_MEMBER +# RvR: this breaks things on RHEL5 +#AC_C_FLEXIBLE_ARRAY_MEMBER I managed to compile on EL4 and EL5 koji result http://koji.fedoraproject.org/koji/taskinfo?taskID=2907187 http://koji.fedoraproject.org/koji/taskinfo?taskID=2907203 -- gpg --keyserver pgp.mit.edu --recv-key 092164A7 http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7

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What iSCSI is used in Centos 5 and RHEL6?
by Emmanuel Noobadmin 12 Mar '11

12 Mar '11

I was looking up on iSCSI in preparation and became aware that there are different iSCSI software/drivers/whatever-is-the-correct-term available. e.g. IET http://iscsitarget.sourceforge.net/ SCST http://scst.sourceforge.net/ STGT http://stgt.berlios.de/ LIO http://linux-iscsi.org/ Based on what I can see, it seems to be STGT because the site provides a link to Redhat advisory which seems to imply that it's what's being used in RHEL. Does anybody know for sure?

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Re: [CentOS] CentOS MD RAID 1 on Openfiler iSCSI
by Emmanuel Noobadmin 12 Mar '11

12 Mar '11

On 3/2/11, Rudi Ahlers <Rudi(a)softdux.com> wrote: > I'm very interested to find out what happened with this project and > what you ended up doing? There were delays after changes after delays for that project that was meant to run on the VM setup. Spent more time hacking temporary solutions to their problems with NAS and such. So I haven't actually got this done. But if you can wait, I could probably answer you in about 4 weeks... when the hardware and fibre connectivity for the client's server room comes in.

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Re: [CentOS] Race condition with mdadm at boot [still mystifying]
by Chuck Munro 12 Mar '11

12 Mar '11

On 03/11/2011 09:00 AM, Les Mikesell wrote: > > On 3/10/11 9:25 PM, Chuck Munro wrote: > >> > However, on close examination of dmesg, I found something very >> > interesting. There were missing 'bind<sd??>' statements for one or the >> > other hot spare drive (or sometimes both). These drives are connected >> > to the last PHYs in each SATA controller ... in other words they are the >> > last devices probed by the driver for a particular controller. It would >> > appear that the drivers are bailing out before managing to enumerate all >> > of the partitions on the last drive in a group, and missing partitions >> > occur quite randomly. >> > >> > So it may or may not be a timing issue between the WD Caviar Black >> > drives and both the LSI and Marvell SAS/SATA controller chips. > I've seen some weirdness in powering up 6 or more SATA drives but never > completely pinned down whether it was the controller, drive cage, or particular > drives causing the problem. But I think my symptom was completely failing to > detect some drives when certain combinations of disks were installed although > each would work individually. Do you have any options about whether they power > up immediately or wait until accessed? > That's a good question, one I have experimented with. I don't have any choice as to when the drives are spun up (only on bootup), but I did try a controller card which pre-spun and checked the identification of the drives before handing off to the BIOS for bootup. That didn't help. On the particular Supermicro motherboard I'm using, there is a very long delay (10 or 15 sec) between power-on and initiation of visible BIOS activity, so all disk drives have ample time to spin up and stabilize. The drives' SMART data shows that the average spin-up time is well within the BIOS startup delay. Each drive activity indicator shows that they are always probed by the kernel's scsi scan process. I have since tried a couple of other tricks I found by Googling around ... setting the kernel parameters 'rootdelay=xx' and 'scsi_mod.scan=sync'. These had no effect on the problem. For some unfathomable reason, the last drives in each group of drives have one or more random partitions missing, with no 'bind' statement in dmesg. Other partitions on those drives are bound normally. This has been tested with at least two known-good replacement drives, with the same random results. On two occasions today, everything worked perfectly, but that was unusual. A friend of mine suggested an ugly hack - connect two 'dummy' unused old SATA drives to the last port of each controller (I'm using only 6 of 8 on each). I wonder if one of those $15 IDE-to-SATA converters would do the job (without a drive attached)? Foolish thought :-/ Chuck

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screen saver unlock dialog window is not visible in clone mode
by DarkKnight BrightWarrior 12 Mar '11

12 Mar '11

Hi, Environment: I am using CentOS 5.3 operating system. I upgraded xorg of centos to 7.3. I am using intel 945 GM board. My xorg server version is 1.4.2 and inetl driver version 2.4.3. gnome-screensaver version is 2.16.1-8.el5. Problem: I connected another system of same hardware using VGA output. Now I can see clone of my system on secondary display. I enabled screensaver with 1 minute period and also enabled locking feature using gnome-screensaver-preferences. After 1 minute screensaver appeared on both primary and secondary displays. But when I move mouse or press any key, Screen saver unlock dialog is not appearing. But when I type password, I am able to comeout of screensaver. So Screensver unlock dialog is there but it is not visible. When I remove secondary display, I mean when I am in single display mode screen saver unlock dialog is visible and working fine. So what could be the problem that causing screensaver unlock dialog window to appear/visible in clone/extended monitor mode. Please help. Thanks

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Re: [CentOS] Server locking up everyday around 3:30 AM
by m.roth＠5-cent.us 12 Mar '11

12 Mar '11

PJ wrote: > On Fri, Mar 11, 2011 at 11:05 AM, Steve Thompson <smt(a)vgersoft.com> wrote: >> >>> PJ wrote: >>>> Mar 8 03:33:18 web1 kernel: INFO: task wget:13608 blocked for more than 120 seconds. <snip> > Great replies from everyone, I really appreciate the feedback. > > Interesting entries in /var/log/cron: <snip> > Mar 11 03:01:01 web1 crond[13613]: (root) CMD (run-parts /etc/cron.hourly) Mar 11 03:07:20 web1 crond[13727]: (webuser) error: Job execution of per-minute job scheduled for 03:05 delayed into subsequent minute 03:07. Skipping job run. > Mar 11 03:07:20 web1 crond[13727]: CRON (webuser) ERROR: cannot set security context <snip> SELINUX! Look at /var/log/messages for an selinux error: if you don't have sealert, install the package, then use it on /var/log/audit. Or put selinux in permissive mode. mark

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rpm 9.7.3 for epel-6 and centos 5.5
by fakessh ＠ 12 Mar '11

12 Mar '11

hello centos list I recompile the source rpm fedora core 14 on my centos 5.5. I wrote a post on my blog to explain how I did. goo.gl/p0sqF I also recompile the rpm via koji to epel 6 and the result is possitive goo.gl/OQwIX package is on it safe sincerely -- gpg --keyserver pgp.mit.edu --recv-key 092164A7 http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7

2 2

yum tries to install a mix of architectures
by Tim Dunphy 11 Mar '11

11 Mar '11

Hello, On my centos boxes whenever I try to install packages I get a mix of packages from the repos that are both i386 and x86_64 in archictecture: =============================================================================================================================================================================================================== Package Arch Version Repository Size =============================================================================================================================================================================================================== Installing: boost-devel i386 1.33.1-10.el5 base 4.3 M boost-devel x86_64 1.33.1-10.el5 base 4.4 M Installing for dependencies: boost i386 1.33.1-10.el5 base 863 k boost x86_64 1.33.1-10.el5 base 861 k libicu i386 3.6-5.11.4 base 5.2 M libicu x86_64 3.6-5.11.4 base 5.2 M Transaction Summary =============================================================================================================================================================================================================== Install 6 Package(s) Upgrade 0 Package(s) Without having so specify the arch on each yum command how can I automatically prune my yum repo files so that it will only grab packages that relate to the architecture I'm running? Thanks in advance! -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

7 11

debugging auto mount configuration
by Boris Epstein 11 Mar '11

11 Mar '11

Hello there, I successfully use automount to mount a large XFS pargtition on one CentOS 5.5 machine. I then tried to do the same thing on a different machine - and it simply would not work! The configuration is done in the same fashion, I checked and double-checked the syntax - but it is still a no go. When I use the mount command the partition mounts perfectly. I have tried running automount --debug and automount --verbose and thus far have not seen any messages that would shed any light on what's going on. So I am a bit lost at the moment. Any advice on how to proceed would be much appreciated. Boris.

3 2

HTtrack for Centos 5.5 ?
by Always Learning 11 Mar '11

11 Mar '11

Does anyone know how to install HTtrack on Centos 5.5 please ? -- With best regards, Paul. England, EU.

2 1

UDP Perfomance tuning
by Prasad Pillarisetti 11 Mar '11

11 Mar '11

Hi, We are running on 5.5 on a HP ProLiant DL360 G6. Kernel version is 2.6.18-194.17.1.el5 (we had also tested with the latest available kernel kernel-2.6.18-238.1.1.el5.x86_64) We running some performance tests using the "iperf" utility. We are seeing very bad and inconsistent performance on the UDP testing. The maximum we could get, was 440 Mbits/sec, and it varies from 250 to 440 Mbits/sec. We are connected on a 1000Mb/s link, we also tested the same using a cross-over connections between the two machines, but the same performance. We also see a lot of dropped UDP packets. Udp: 551522838 packets received 1902 packets to unknown port received. 109709802 packet receive errors 7239 packets sent We had checked all the kernel configurations and set them as recommended. This is the settings and tests we have done Server: net.core.rmem_default = 2097152 net.core.wmem_default = 2097152 net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 strace -fttt -o /tmp/server.trace iperf -s -u -p 2222 -w 6m -i 5 -l 1k Client: net.core.rmem_default = 2097152 net.core.wmem_default = 2097152 net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 strace -fttt -o /tmp/client.trace iperf -p 2222 -u -w 6m -i 5 -t 60 -c 192.168.1.2 -b 990M -l 1k Can someone please help me with this, since I am running in circles and can't get the required UDP performance? -- Prasad Pillarisetti "If everything is coming your way, then you are in the wrong lane"

2 1

question on modules loaded
by Jerry Geis 11 Mar '11

11 Mar '11

lsmod shows dm_raid45 66509 0 dm_message 6977 1 dm_raid45 dm_region_hash 15681 1 dm_raid45 dm_log 14529 3 dm_mirror,dm_raid45,dm_region_hash dm_mod 62201 4 dm_mirror,dm_multipath,dm_raid45,dm_log dm_mem_cache 9537 1 dm_raid45 I am wondering why these raid modules are loaded as I am not running raid on this particular machine and looking for ways to free up memory. THanks, jerry

1 0

Re: [CentOS] Installation failure
by Chris Weisiger 11 Mar '11

11 Mar '11

Glad you got it working. Most of the power supply checkers aren't worth it. I checked 3 power supplies with a checker and all 3 didnt work on the pc i was working on. It was the power supplies, i took one out of a running pc and the one being worked on powered up. So it is just easier just to swap the power supply out to start with. Chris ----- Original Message ----- From:Mark <mhullrich(a)gmail.com> To:CentOS mailing list <centos(a)centos.org> Cc: Sent:Thursday, March 10, 2011 11:59 PM Subject:Re: [CentOS] Installation failure On Thu, Mar 10, 2011 at 9:01 PM, Chris Weisiger <cweisiger(a)bellsouth.net> wrote: > Try checking the power supply, swap in another one from a different pc. > Yeah, I figured that out about half an hour ago and got it going. Shoulda thought of that up front. Interestingly, I have a power supply tester I bought at CompUSA before they left SoCal, and it said that power supply was fine. Ha ha ha. I think I need a new one, one that actually works.... Thanks, everyone. _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

2 1

Server hangs on CentOS 5.5
by Michael Eager 11 Mar '11

11 Mar '11

Hi -- I'm running a server which is usually stable, but every once in a while it hangs. The server is used as a file store using NFS and to run VMware machines. I don't see anything in /var/log/messages or elsewhere to indicate any problem or offer any clue why the system was hung. Any suggestions where I might look for a clue? -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

18 87

Installation failure
by Mark 11 Mar '11

11 Mar '11

I'm trying to reinstall CentOS on a machine I've reconditioned for it, but for reasons I can't fathom, when the installation disk comes up and prompts for the install type, and I type either <enter> (graphics isntall) or "linux text"<enter>, after it loads the initrd image, the machine shuts off. It's an older machine I built myself (and ran CentOS on for a number of years), AMD Athlon 64 x2, 2GB of memory, 2 SATA hard drives, ECS GE6100PM-M2 motherboard. I should probably even know the answer to this one, but I'm stumped. Any suggestions? Thanks.

4 5

Race condition with mdadm at boot [still mystifying]
by Chuck Munro 11 Mar '11

11 Mar '11

This is a bit long-winded, but I wanted to share some info .... Regarding my earlier message about a possible race condition with mdadm, I have been doing all sorts of poking around with the boot process. Thanks to a tip from Steven Yellin at Stanford, I found where to add a delay in the rc.sysinit script, which invokes mdadm to assemble the arrays. Unfortunately it didn't help, so it likely wasn't a race condition after all. However, on close examination of dmesg, I found something very interesting. There were missing 'bind<sd??>' statements for one or the other hot spare drive (or sometimes both). These drives are connected to the last PHYs in each SATA controller ... in other words they are the last devices probed by the driver for a particular controller. It would appear that the drivers are bailing out before managing to enumerate all of the partitions on the last drive in a group, and missing partitions occur quite randomly. So it may or may not be a timing issue between the WD Caviar Black drives and both the LSI and Marvell SAS/SATA controller chips. So, I replaced the two drives (SATA-300) with two faster drives (SATA-600) on the off chance they might respond fast enough before the drivers move on to other duties. That didn't help either. Each group of arrays uses completely drivers (mptsas and sata_mv) but both exhibit the same problem, so I'm mystified as to where the real issue lies. Anyone care to offer suggestions? Chuck

2 1

Installing odbtp on CentOS 5.5
by Ron Young 11 Mar '11

11 Mar '11

I have just bought a new machine and of course installed CentOS 5.5 x86_64 from a recently created DVD. So the machine has: PHP Version => 5.2.17 MySQL Client API version => 5.0.77 Apache/2.2.3 Does anyone know how to get odbtp installed? I have followed all the INSTALL and README instructions that came with the odbtp package including the README.64bitOS file. There has got to be a trick some where that I am missing. TIA. Regards, Ron Young 919-621-9015 http://www.linkedin.com/in/ronhyoung +++++++++++++++++++ Little tiny dreams require little tiny thoughts and little tiny steps. Great big dreams require great big thoughts and little tiny steps. +++++++++++++++++++

1 0

Re: [CentOS] Creating the symbolic links in the /boot and /boot/grub/
by Todd Cary 11 Mar '11

11 Mar '11

I inadvertently missed using the list...here are my recent messages. On 3/8/2011 8:39 PM, Nico Kadel-Garcia wrote: > On Tue, Mar 8, 2011 at 11:31 PM, Todd Cary<todd(a)aristesoftware.com> wrote: >> reinstall is not an option for yum. I ran "yum install kernel" and it >> completed without errors however there are no links created. > Oh, dear. Can you grab the RPM and do "rpm -U -replacepkgs > [kernel-whatver].rpm"? You should be able to use "yum remove" on the > old kernel packages, consistent with freeing up the space, and now > install your new kernel with yum. > >> Would this be the correct ln command for vmlinuz-2.6.9-89.35.1 >> >> # /boot/vmlinuz-2.6.9-89.35.1 /boot/vmlinuz >> >> Todd >> >> On 3/8/2011 7:04 PM, Nico Kadel-Garcia wrote: >>> On Tue, Mar 8, 2011 at 9:58 PM, Todd Cary<todd(a)aristesoftware.com> wrote: >>>> I started a new thread since the original one is getting rather long. >>>> >>>> I have retrieved the files I deleted in /boot and /boot/grub, >>>> however I need to make links for >>>> >>>> /boot/System.map (System.map -> System.map-2.6.9-89.35.1) >>>> /boot/vmlinuz (vmlinuz -> vmlinuz-2.6.9-89.35.1) >>>> /boot/grub/menu.lst (menu.lst -> ./grub.conf) >>> Instead, re-install your kernel. "yum reinstall kernel". This should >>> regenerate your symlinks correctly, except possibly the grub.conf. >>> >>>> If it was not so important to get it correct, I would appreciate >>>> the syntax for the command. Usually I would figure it out. >>>> >>>> Since I have restored the files (I will double check to make sure >>>> they are all there), do I need to run grub-install? >>> i think yes. The old location of the boot loader is listed in >>> /boot/grub/grub.conf, and should be used as the argument to that >>> command. grub is much smarter than LILO used to be, but I think the >>> bootstrap procedure relies on knowing details of where the fiddly bits >>> of grub live on the relevant ex2 compatible filesytem. >>> >>>> My apologies for bothering everyone with such a dumb error on my >>>> part. >>>> >>>> Todd >>>> >>>> -- >>>> Ariste Software >>>> Petaluma, CA 94952 >>>> >>>> http://www.aristesoftware.com >>>> >>>> _______________________________________________ >>>> CentOS mailing list >>>> CentOS(a)centos.org >>>> http://lists.centos.org/mailman/listinfo/centos >>>> >> -- >> Ariste Software >> Petaluma, CA 94952 >> >> http://www.aristesoftware.com >> >> > -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

5 11

mod_encoding
by a arias 11 Mar '11

11 Mar '11

I'm trying to setup the Janrain implementation of OpenID in a dev box running CentOS 5.5. The detect.php script is telling me, "Your web server seems to corrupt queries. Received , expected a=%26b. Check for mod_encoding." Does anyone know what package provides this? Thanks

1 0

mkswap - unable to relabel, operation not supported
by neubyr 10 Mar '11

10 Mar '11

Hi, I am getting following error on creating a swap fs. CentOS 5.5 {{{ mkswap: unable to relabel /srv/cloud/one/var/25/images/disk.1 to system_u:object_r:swapfile_t: Operation not supported }}} The selinux is configured in permissive mode. Any clues on what might be wrong here and how to fix it? {{{ # /bin/dd if=/dev/zero of=/srv/cloud/one/var/25/images/disk.1 bs=1 count=1 seek=512M # sudo /sbin/mkswap /srv/cloud/one/var/25/images/disk.1 Setting up swapspace version 1, size = 536866 kB mkswap: unable to relabel /srv/cloud/one/var/25/images/disk.1 to system_u:object_r:swapfile_t: Operation not supported # file /srv/cloud/one/var/25/images/disk.1 /srv/cloud/one/var/25/images/disk.1: Linux/i386 swap file (new style) 1 (4K pages) size 131071 pages }}} -- thanks, neuby.r

2 3

Any reliable way to determine LVM snapshot creation time?
by Dr. Ed Morbius 10 Mar '11

10 Mar '11

We utilize LVM snapshots for some periodic maintenance. They're manually created and, usually, manually destroyed. But not always. So there's now a nightly script monitoring for open snapshots. Which raises the question of when a given snapshot was created. Absent good practices of, say, using sudo to create snapshots (leaving a /var/log/secure message), is there any reasonably reliable way to determine when an LVM was created? There's a timestamp on the /dev/mapper/<snapshot> file. I'm presuming that's somewhat useful for this purpose? Ah: just found /var/log/messages also indicates: lvm[2314]: Monitoring snapshot <name> lvm[2314]: No longer monitoring snapshot <name> ... which I think answers my own question. Posting here for Google's sake and/or discussion. -- Dr. Ed Morbius, Chief Scientist / | Robot Wrangler / Staff Psychologist | When you seek unlimited power Krell Power Systems Unlimited | Go to Krell!

1 0

Can anyone help me understand Apache Errors?
by Todd 10 Mar '11

10 Mar '11

LogWatch reports items like: Connection attempts using mod_proxy: 83.167.123.83 -> 205.188.251.1:443: 1 Time(s) 83.167.123.83 -> 64.12.202.36:443: 2 Time(s) Requests with error response codes 403 Forbidden 205.188.251.1:443: 1 Time(s) 64.12.202.36:443: 2 Time(s) 404 Not Found //jmx-console/HtmlAdaptor: 1 Time(s) /VINT_1984_THINK_DIFFERENT: 1 Time(s) /mobo.png: 1 Time(s) /player.swf: 1 Time(s) /robots.txt: 4 Time(s) Now, I know mod_proxy is turned off by default, but is there a way to "play games" with those that attempt a proxy connection? Like a ReWrite rule or some sort? For the 404's, Obviously these don't exist, but robots.txt so I am not sure why that has a 404. What are 406 errors? Some Googling say they are due to mod_security issues and that an .htaccess fix can turn it off. But I don't understand the issue and the solution to be honest. What am I missing? -Jason

2 1

Dell PERC H800 commandline RAID monitoring tools
by Dr. Ed Morbius 10 Mar '11

10 Mar '11

We're looking for tools to be used in monitoring the PERC H800 arrays on a set of database servers running CentOS 5.5. We've installed most of the OMSA (Dell monitoring) suite. Our current alerting is happening through SNMP, though it's a bit hit or miss (we apparently missed a couple of earlier predictive failure alerts on one drive). OMSA conflicts with mega-cli, though we may find that the latter is the more useful package. Both are pretty byzantine, the Dell stuff simply doesn't have docs (in particular: docs on how to interpret the omconfig log output). Ideally we'd like something which could be run as a Nagios plugin or cron job providing information on RAID status and/or possible disk errors. Probably both, actually. Thanks in advance. -- Dr. Ed Morbius, Chief Scientist / | Robot Wrangler / Staff Psychologist | When you seek unlimited power Krell Power Systems Unlimited | Go to Krell!

6 12

how to control sftp's user file folder
by Yang Yang 10 Mar '11

10 Mar '11

hi,i have a question want to ask if i add a user like: useradd test groupadd test -g www and how to control user test only can see and write only folder(like /home/htdocs/test,he can not see /home/htdocs or other folder) thanks very much

12 22

CentOS-announce Digest, Vol 73, Issue 3
by centos-announce-request＠centos.org 10 Mar '11

10 Mar '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2011:0337 Important CentOS 4 x86_64 vsftpd - security update (Johnny Hughes) 2. CESA-2011:0337 Important CentOS 4 i386 vsftpd - security update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 10 Mar 2011 03:59:53 -0600 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2011:0337 Important CentOS 4 x86_64 vsftpd - security update To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <4D78A119.2000301(a)centos.org> Content-Type: text/plain; charset="iso-8859-1" CentOS Errata and Security Advisory CESA-2011:0337 vsftpd security update for CentOS 4 x86_64: https://rhn.redhat.com/errata/RHSA-2011-0337.html The following updated files have been uploaded and are currently syncing to the mirrors: x86_64: vsftpd-2.0.1-9.el4.x86_64.rpm src: vsftpd-2.0.1-9.el4.src.rpm

1 0

RHEL4 EOL
by Kwan Lowe 10 Mar '11

10 Mar '11

Just curious... CentOS4 lifetime tracks RHEL4 somewhat... Since RedHat has announced LTS (Long Term Support) for RHEL4, are there plans to extend the CentOS 4 support window?

4 6

Next3 (eg ext3 snapshots support) on OpenNode / CentOS 5 / RHEL 5 howto and rpms
by Andres Toomsalu 10 Mar '11

10 Mar '11

We have created an next3 and patched e2fsprogs OpenNode / CentOS 5 / RHEL 5 rpms - installable from opennode-test yum repo. Provided next3 kernel module is currently built against RHEL5 OpenVZ kernel used in OpenNode - so installing this next3 rpm package on your CentOS 5 or RHEL 5 host will install also OpenVZ patched RHEL5 kernel and newer e2fsprogs package. Installation and usage instructions are provided by this howto document: http://opennode.activesys.org/documentation/howtos/next3-snapshots/ There is also simple next3 snapshotting automation script available for use with cron - usage and download link provided in howto document referenced above. Regards, -- ---------------------------------------------- Andres Toomsalu, andres(a)active.ee

2 1

sata drives and controlers
by Michel Donais 10 Mar '11

10 Mar '11

I intend to replace fading SCSI drive by a SATA one. The motherboard is PCI and no SATA controller on board. So I need a SATA/PCI controller. Is there something wrong to do this kind of switch? Some told me that I won't be able to boot that drive. Loosing part of the SATA interface speed is not a decisive factor on this machine Is there are some prefered Linux SATA controller? Need experienced feedbacks. --- Michel Donais

4 5

Re: [CentOS] [Newbie] Reclaiming /boot space
by Simon Matter 10 Mar '11

10 Mar '11

> On Wed, Mar 9, 2011 at 10:12 AM, Simon Matter <simon.matter(a)invoca.ch> > wrote: >>> Yes...thank you for the suggestion...since that was the cause of >>> my problem in the first place!! I should have known better; all >>> I had to do was remove some of the outdated kernel files. And >>> when I did the dumb thing of deleting the /boot files, they were >>> moved into the "protected" .Trash-boot directory. >> >> OK, now let us know exactly what you have. Is it CentOS 4 as I expected? >> If so, the listing of files in /boot should look like so: >> >> [root@abc ~]# ls -laR /boot/ >> /boot/: >> total 3771 >> drwxr-xr-x 4 root root 1024 Mar 3 11:31 . >> drwxr-xr-x 24 root root 4096 Mar 3 11:37 .. >> -rw-r--r-- 1 root root 51676 Feb 18 07:41 config-2.6.9-100.EL >> drwxr-xr-x 2 root root 1024 Mar 3 11:31 grub >> -rw-r--r-- 1 root root 1364958 Mar 3 11:20 initrd-2.6.9-100.EL.img >> drwx------ 2 root root 12288 Jul 8 2005 lost+found >> -rw-r--r-- 1 root root 9371 Aug 13 2006 message >> -rw-r--r-- 1 root root 9371 Aug 13 2006 message.ja >> -rw-r--r-- 1 root root 67797 Feb 18 07:41 symvers-2.6.9-100.EL.gz >> -rw-r--r-- 1 root root 770652 Feb 18 07:41 System.map-2.6.9-100.EL >> -rw-r--r-- 1 root root 1538264 Feb 18 07:41 vmlinuz-2.6.9-100.EL >> >> /boot/grub: >> total 198 >> drwxr-xr-x 2 root root 1024 Mar 3 11:31 . >> drwxr-xr-x 4 root root 1024 Mar 3 11:31 .. >> -rw-r--r-- 1 root root 82 Aug 9 2005 device.map >> -rw-r--r-- 1 root root 7956 Aug 9 2005 e2fs_stage1_5 >> -rw-r--r-- 1 root root 7684 Aug 9 2005 fat_stage1_5 >> -rw-r--r-- 1 root root 6996 Aug 9 2005 ffs_stage1_5 >> -rw------- 1 root root 589 Mar 3 11:31 grub.conf >> -rw------- 1 root root 593 Aug 9 2005 grub.conf.orig >> -rw-r--r-- 1 root root 7028 Aug 9 2005 iso9660_stage1_5 >> -rw-r--r-- 1 root root 8448 Aug 9 2005 jfs_stage1_5 >> lrwxrwxrwx 1 root root 11 Aug 9 2005 menu.lst -> ./grub.conf >> -rw-r--r-- 1 root root 7188 Aug 9 2005 minix_stage1_5 >> -rw-r--r-- 1 root root 9396 Aug 9 2005 reiserfs_stage1_5 >> -rw-r--r-- 1 root root 3605 Aug 13 2006 splash.xpm.gz >> -rw-r--r-- 1 root root 512 Aug 9 2005 stage1 >> -rw-r--r-- 1 root root 103816 Aug 9 2005 stage2 >> -rw-r--r-- 1 root root 7272 Aug 9 2005 ufs2_stage1_5 >> -rw-r--r-- 1 root root 6612 Aug 9 2005 vstafs_stage1_5 >> -rw-r--r-- 1 root root 9308 Aug 9 2005 xfs_stage1_5 >> >> /boot/lost+found: >> total 14 >> drwx------ 2 root root 12288 Jul 8 2005 . >> drwxr-xr-x 4 root root 1024 Mar 3 11:31 .. >> >> 1) I don't know which tool you have used to move things to "Trash" but >> you >> should be aware that it may well be the case that some permissions and >> or >> file types like symlinks may not be correct after recovering from >> "Trash". >> >> 2) The directory "lost+found" can be recreated using the command >> 'mklost+found' >> >> 3) I'm not sure on how to make grub work again, but maybe some steps qre >> required after copying everything back to /boot. I hope someone else can >> give you better info about this. >> >> Simon >> >> > > > Wouldn't it have been easier to reinstall the kernel & grub, i.e.: > > yum reinstall kernel grub > > Surely if yum reinstalls it, it would re-create the permissions & > symlinks as well? Yes, only that reinstall doesn't exist in EL4 :) Simon

5 5

keepalived+LVS
by bedo 10 Mar '11

10 Mar '11

hello, all! if i want to use lvs function of keepalived , i must install ipvsadm ? tks!

4 9

Re: [CentOS] Server hangs on CentOS 5.5
by Michael Eager 10 Mar '11

10 Mar '11

Rudi Ahlers wrote: > As far as I can see you were giving a bucked load of advice, which you > haven't even bothered to follow yet. You're the only one who could > actually do anything about the problem. I have followed quite a bit of the advice, which I have appreciated and noted. I've set up the monitor so that it will not be blanked on a crash, installed monitoring software, and checked a number of conditions which people have suggested. No, I have not responded to the philosophical discussions about vender management, nor to the suggestions to RMA something to somebody for unknown reasons. No, I'm not going to replace RAM or capacitors here and there on the off chance that something might be bad. (But I will look for capacitors which show signs of bulging or leaking.) > No amount of suggestions made on this list will fix the problem for > you. You need to actually take apart the server and see what's going > on. I wasn't interested in anyone fixing the server for me. I did ask for suggestions on how improve the diagnostics for the problem, which several people have responded to. Again, I appreciate their suggestions greatly. As I've said, I have a list of things to check when the server is next taken down. -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

1 0

Re: [CentOS] Server hangs on CentOS 5.5
by Michael Eager 09 Mar '11

09 Mar '11

Rudi Ahlers wrote: > On Thu, Mar 10, 2011 at 12:31 AM, Michael Eager <eager(a)eagerm.com> wrote: >> Dr. Ed Morbius wrote: >> >>> If the issue is repeated but rare system failures on one of a set of >>> similarly configured hosts, I'd RMA the box and get a replacement. End >>> of story. >> I'll repeat: this is a house-made system. There's no vendor to RMA to. > > > > I don't know where you are, but in our country we can RMA anything and > everything. Apart from CPU's. So, even a cheap desktop mobo could be > RMA'd, as long as I can prove to the suppliers it's faulty, and it's > within the warrenty period I responded to Dr. Morbius' suggestion that I "RMA the box". There is vendor to RMA the box to. If I knew that it was a motherboard problem, I could RMA it. Or disk, or PSU, or network card, or whatever. But, as I've mentioned, there's no indication what causes the system to hang. There is no way at this point to prove that it is a defective motherboard. -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

2 1

[Newbie] Reclaiming /boot space
by Todd Cary 09 Mar '11

09 Mar '11

When trying to do a yum update, I am told I need more space in /boot. When I check the contents of /boot (ls -l /boot), there are no files. If I do a df -h, there is no available space yet it shows that it has a lot of used space. The fstab shows the following: # This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/hda /media/cdrom auto pamconsole,exec,noauto,managed 0 0 # fschk.ext3 /boot gives this error: The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> I am not sure what I should do next. Thank you in advance for any suggestions... Todd -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

9 27

scanning under CentOS
by Boris Epstein 09 Mar '11

09 Mar '11

Hello listmates, I've got an HP Officejet 7110 All-in-One Printer which I am trying to get to scan for us. Details on the printer/scanner/FAX here: http://h10025.www1.hp.com/ewfrf/wc/product?cc=us&lc=en&dlc=en&product=91472 Now xsane seems to handle individual pages OK but multiplage scans through the ADF - that seems to be a complete mess. Hence the questions: 1) Is there a good scanner interface package that would allow me to just load the paper into the ADF, say "go" and watch the scanner go through the pages I've put in and produce an output file when it's done? 2) Has anyone worked with the scanner I am trying to use? What was your experience like when you did? Thanks. Boris.

1 0

Security updates for CentOS-5
by Mark Foster 09 Mar '11

09 Mar '11

Hello, I was wondering why there haven't seemed to be any security updates for centos-5 since Jan 6. Per https://rhn.redhat.com/errata/rhel-server-errata.html there are a ton of outstanding issues. Thanks. -- Mark D. Foster <mark(a)foster.cc> http://mark.foster.cc/

4 3

kernel vulnerabilities
by Riccardo Veraldi 09 Mar '11

09 Mar '11

Hello, I am using CentOS 5.5 I planned to update the kernel rpm because of vulnerabilities came out lately. The new redhat updated kernel would be 2.6.18-238.5.1.el5 Also Scientific Linux did and update to the kernels according to redhat advisories but I have seen that CentOS is still bound to kernel 2.6.18-194.32.1.el5 so no security update is available. I was wondering if this is normal or not. thank you Riccardo

5 6

Re: [CentOS] Server hangs on CentOS 5.5
by Leen de Braal 09 Mar '11

09 Mar '11

> On Wed, Mar 9, 2011 at 10:24 AM, Leen de Braal <ldb(a)braha.nl> wrote: >>> m.roth(a)5-cent.us wrote: >>>> Michael Eager wrote: >>> >>>>> House-built, Gigabyte MB, AMD Phenom II X6, 6Gb RAM. >>>> >>>> Any chance the problem's with the video card? >>> >>> Video is on the MB. It doesn't seem likely that it's >>> the video, since the system doesn't respond to network >>> when it crashes. >>> >>> It could be anything. That's why I'm looking for >>> something that would give me a bit of a hint what >>> to look at. With an infrequent failure, it's not >>> practical to replace components piecemeal. >> >> While you open the case, check for the bulging capacitor problem. >> Will have the effect you describe, freezing up the system so that even >> bios routines don't work (your fans). >> If that's the case, replace mainboard. >> > > > Or replace the CAPS if you're not afraid of a soldering iron :) Very often resulting in a damaged board, because you damage the via's when pulling the caps. But it is worth a try. > > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > -- L. de Braal BraHa Systems NL - Terneuzen T +31 115 649333 F +31 115 649444

3 3

/etc/hosts - hostname alias for 127.0.0.1
by Sean Carolan 09 Mar '11

09 Mar '11

Can anyone point out reasons why it might be a bad idea to put this sort of line in your /etc/hosts file, eg, pointing the FQDN at the loopback address? 127.0.0.1 hostname.domain.com hostname localhost localhost.localdomain

9 17

connection speeds between nodes
by wessel van der aart 09 Mar '11

09 Mar '11

Hi All, I've been asked to setup a 3d renderfarm at our office , at the start it will contain about 8 nodes but it should be build at growth. now the setup i had in mind is as following: All the data is already stored on a StorNext SAN filesystem (quantum ) this should be mounted on a centos server trough fiber optics , which in its turn shares the FS over NFS to all the rendernodes (also centos). Now we've estimated that the average file send to each node will be about 90MB , so that's what i like the average connection to be, i know that gigabit ethernet should be able to that (testing with iperf confirms that) but testing the speed to already existing nfs shares gives me a 55MB max. as i'm not familiar with network shares performance tweaking is was wondering if anybody here did and could give me some info on this? Also i thought on giving all the nodes 2x1Gb-eth ports and putting those in a BOND, will do this any good or do i have to take a look a the nfs server side first? thanks, Wessel

6 17

what is the “Online Certificate Status Protocol”
by erikmccaskey64 09 Mar '11

09 Mar '11

I use privoxy. In the user.action file i have a redirect rule and a few websites: { +redirect{s@http://@https://@} } .twitter.com .facebook.com Ok! it's working great, e.g.: if i visit any "*twitter.com" URL it gets redirected to HTTPS! But: with wireshark i can see some "OCSP" packets [ http://en.wikipedia.org/wiki/Online_Certificate_Status_Protocol ] Question: What are these packets? Why aren't there in HTTPS? Is my redirection method with privoxy is secure? Thank you for any tips/opinions!

2 1

Re: [CentOS] Internet connection sharing?
by hadi motamedi 09 Mar '11

09 Mar '11

On 3/8/11, Rudi Ahlers <Rudi(a)softdux.com> wrote: > On Tue, Mar 8, 2011 at 12:09 PM, hadi motamedi <motamedi24(a)gmail.com> wrote: >> On 3/8/11, Jakub Jedelsky <jakub.jedelsky(a)gmail.com> wrote: >>> Dne 8.3.2011 10:19, hadi motamedi napsal(a): >>>> Dear All >>>> My centos machine is connected to my MS Windows machine on the net.The >>>> MS Windows machine is connected to Internet via valid IP address >>>> setting and on its secondary ip address setting it can see my centos >>>> machine on the intranet.Can you please let me know how can try for >>>> Internet connection sharing such that my centos machine can see >>>> internet with minor modifications done? >>>> Thank you in advance >>> >>> Hi hadi, >>> >>> this isn't centos thing, all you need is to configure network bridge on >>> your Windows machine. You didn't send info about your windows verison so >>> try to google something about it >>> (http://www.google.com/#q=windows+network+bridge) >>> >>> JJ >>> _______________________________________________ >>> CentOS mailing list >>> CentOS(a)centos.org >>> http://lists.centos.org/mailman/listinfo/centos >>> >> Thank you very much for your reply.I am familiar with internet >> connection sharing on MS Windows as I have a third XP client on the >> same net connected to the internet.I tried as the following on my >> centos: >> #route add -net default gw 172.18.209.1 >> Where this is the secondary ip address of the MS Windows host.But the >> centos cannot see the internet. Can you please let me know why? >> _______________________________________________ > > > Did you add any DNS resovler IP's to /etc/resolv.conf ? > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > Yes, I did but still internet unreachable.

4 6

how to only allow tcp on dport 443 on the OUTPUT chain?
by erikmccaskey64 09 Mar '11

09 Mar '11

it's a normal desktop machines iptables firewall: If i want to block udp on dport 80 on the output chain, then is this enough? i want to only allow tcp on it! iptables -P OUTPUT DROP iptables -A OUTPUT -o $PUBIF --dport 80 -j ACCEPT or i need this rule? iptables -P OUTPUT DROP iptables -A OUTPUT -o $PUBIF -p tcp --dport 80 -j ACCEPT the second one is the good one?

1 0

Re: [CentOS] Creating the symbolic links in the /boot and /boot/grub/
by Nico Kadel-Garcia 09 Mar '11

09 Mar '11

On Wed, Mar 9, 2011 at 12:40 AM, Todd Cary <todd(a)aristesoftware.com> wrote: > My current kernel is "vmlinuz-2.6.9-89.35.1" per grub.conf: > > #boot=/dev/hdc > default=1 > timeout=5 > splashimage=(hd0,0)/grub/splash.xpm.gz > hiddenmenu > title CentOS (2.6.9-100.EL) > root (hd0,0) > kernel /vmlinuz-2.6.9-100.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet > initrd /initrd-2.6.9-100.EL.img > title CentOS (2.6.9-89.35.1.ELsmp) > root (hd0,0) > kernel /vmlinuz-2.6.9-89.35.1.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb > quiet > initrd /initrd-2.6.9-89.35.1.ELsmp.img > > What is the correct syntax for "rpm -U -replacepkgs [kernel-whatever].rpm" ? > What should go into [kernel-whaetver]? > > In like manner, I have forgotten how to do a query on it to see if it is > present as in > > # rpm -q [kernel-name] > > Sorry, but it has been a long time since I used rpm and my Admin book does > not give an example. > > Todd OK, this should all go to the list for other CentOS folks who run into this kind of adventure. To get the full list of RPM's, look at the syntax of the "/etc/cron.daily/rpm"nightly script. > man rpm to look up the available options and learn about them. It's usually worth learning about such an important command, and RPM components are what yum really uses, so it's helpful to understand. > rpm -qa | grep kernel to get the list of kernel related components. Because of this line in your grub.conf: kernel /vmlinuz-2.6.9-100.EL I can also deduce that the relevant vmlinuz file was at /boot/bmlinuz-2.6.9-100.EL, and you can use the command "rpm -q -f /boot/vmlinuz-2.6.9-100.EL" to figure out what package it belonged to. > rpm -q -f /boot/vmlinuz-2.6.9-100.EL --qf '%{name}-%{version}-%{release}.%{arch}.rpm\n' will get you the get the full package name of the actual kernel RPM. Download the latest RPM from your favorite CentOS repository, after all, updating your kernel is you got into this trouble in the first place. > rpm -U --replacepkgs [whatever the name of that actual downloaded rpm is] See, you shouldn't *care* about your actual running kernel. You wanted the update, right? Go for it!!!! The running kernel will present problems you want the most recent one.

1 0

Creating the symbolic links in the /boot and /boot/grub/
by Todd Cary 09 Mar '11

09 Mar '11

I started a new thread since the original one is getting rather long. I have retrieved the files I deleted in /boot and /boot/grub, however I need to make links for /boot/System.map (System.map -> System.map-2.6.9-89.35.1) /boot/vmlinuz (vmlinuz -> vmlinuz-2.6.9-89.35.1) /boot/grub/menu.lst (menu.lst -> ./grub.conf) If it was not so important to get it correct, I would appreciate the syntax for the command. Usually I would figure it out. Since I have restored the files (I will double check to make sure they are all there), do I need to run grub-install? My apologies for bothering everyone with such a dumb error on my part. Todd -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

2 1

centos home router-gateway network setup
by Mark Pryor 09 Mar '11

09 Mar '11

Hello, In the last 3 days I setup my SOHO in 2 ways (1) attempt using a retail wifi/router by Netgear. The wifi is not part of this question. WAN (TW Cable modem) | | Netgear (192.168.1.1) \ \ _____\______________ | eth0 | | \ | | \--br0--eth2 | | | | | C5.5 eth1 | | / | |_______ /___________| / / LAN (switch upstairs) above is my first setup for SOHO network. Only br0 had an IP (dynamic). All of the nics had proto None and were slaved to br0. This is a very easy setup. The whole network, from Netgear to LAN and beyond, is one subnet. (2) attempt - permanently remove the Netgear and have C5.5 do all the services- gateway, router, dhcp, and firewall. The only way I could get this to work was with no bridging at all. Each nic needed an IP and all on different subnets. eth0: dynamic from TW WAN eth1: static at 192.168.1.1 eth2: static at 192.168.3.1 Using the lokkit firewall tool and adding NAT/Masquerade to eth0 this worked. My question is: is there a way avoid a wasted IP at eth2 and somehow bridge it to or with eth1 so only one subnet is possible inside the LAN? I know I need at least one static IP on one of the nics for the gateway. -- Mark

2 1

Internet connection sharing?
by hadi motamedi 08 Mar '11

08 Mar '11

Dear All My centos machine is connected to my MS Windows machine on the net.The MS Windows machine is connected to Internet via valid IP address setting and on its secondary ip address setting it can see my centos machine on the intranet.Can you please let me know how can try for Internet connection sharing such that my centos machine can see internet with minor modifications done? Thank you in advance

10 23

Load balancing...
by Todd 08 Mar '11

08 Mar '11

Hi All, Can anyone help me hash out how best to load balance a website that is getting considerable traffic? In the past I only have experience with BigIP where you have a load balancing device that keeps track and send traffic to the best server possible at the time. This was a proprietary system that I think was something Dell rebranded. Right now, the whole site is is 400gb of video, HTML5, Apache, PHP, MySQL, runs on a single box with 16gb of RAM and mirrored /var/www/html (2x1tb raid level drives). I have a Comcast 50/10 connection, 5 statics and I am seeing about 125 unique visitors a day. The site runs fine, but in anticipation of more traffic as well as a learning experience I would like to load balance. Obviously I need a second server just like the one it is running on now. I will probably spec something out that is capable of 32gb of RAM. What about a dedicated load balancing device? What specs should this be? How much RAM, HD, processor? It is sufficient to buy something with a GB NIC and say 4gb of RAM? Can one go slower but more RAM, small HD? I don't really quite know how intensive a task this decision making process is for the load balancer.. Right now, as example, I have an Untangle Firewall and it runs on a old AMD with 2gb RAM, GB NIC and it seems to do just fine. My local computer store has several P4 2.8ghz with 2GB of RAM for like $99.... Can anyone enlighten me on specs, proper setup, caveats....? -Jason

18 33

Re: [CentOS] Internet connection sharing?
by David Brian Chait 08 Mar '11

08 Mar '11

> Do you have any proof of this? OR are you making assumptions of past > experiences? We have many Windows server on the net, directly with > very few hassles. I have never had a *NIX server under my charge hacked, I have had several Windows machines (those directly connected to the internet) hacked. No, I am not a *NIX worshiper either, I happen to have 7 MS certs. With that said, each OS has stregnths and weaknesses, MS tends to function better as a user facing interface to windows desktop infrastructure, but I avoid it like the plague for public facing infrastructure.

1 0

Race condition with mdadm at bootup?
by Chuck Munro 08 Mar '11

08 Mar '11

Hello folks, I am experiencing a weird problem at bootup with large RAID-6 arrays. After Googling around (a lot) I find that others are having the same issues with CentOS/RHEL/Ubuntu/whatever. In my case it's Scientific Linux-6 which should behave the same way as CentOS-6. I had the same problem with the RHEL-6 evaluation version. I'm posting this question to the SL mailing list as well. For some reason, each time I boot the server a random number of RAID arrays will come up with the hot-spare missing. This occurs with hot-spare components only, never with the active components. Once in a while I'm lucky enough to have all components come up correctly when the system boots. Which hot spares fail to be configured is completely random. I have 12 2TB drives, each divided into 4 primary partitions, and configured as 8 partitionable MD arrays. All drives are partitioned exactly the same way. Each R6 array consists of 5 components (partitions) plus a hot-spare. The small RAID-1 host OS array never has a problem with its hot spare. The predominant theory via Google is that there's a race condition at boot time between full enumeration of all disk partitions and mdadm assembling the arrays. Does anyone know of a way to have mdadm delay its assembly until all partitions are enumerated? Even if it's simply to insert a several-second wait time, that would probably work. My knowledge of the internal workings of the boot process isn't good enough to know where to look. I tried to issue 'mdadm -A -s /dev/md/md_dXX' after booting, but all it does is complain about "No suitable drives found for /dev....." Here is the mdadm.conf file: ------------------------------------- MAILADDR root PROGRAM /root/bin/record_md_events.sh DEVICE partitions ##DEVICE /dev/sd* <<---- this didn't help. AUTO +imsm +1.x -all ## Host OS root arrays: ARRAY /dev/md0 metadata=1.0 num-devices=2 spares=1 UUID=75941adb:33e8fa6a:095a70fd:6fe72c69 ARRAY /dev/md1 metadata=1.1 num-devices=2 spares=1 UUID=7a96d82d:bd6480a2:7433f1c2:947b84e9 ARRAY /dev/md2 metadata=1.1 num-devices=2 spares=1 UUID=ffc6070d:e57a675e:a1624e53:b88479d0 ## Partitionable arrays on LSI controller: ARRAY /dev/md/md_d10 metadata=1.2 num-devices=5 spares=1 UUID=135f0072:90551266:5d9a126a:011e3471 ARRAY /dev/md/md_d11 metadata=1.2 num-devices=5 spares=1 UUID=59e05755:5b3ec51e:e3002cfd:f0720c38 ARRAY /dev/md/md_d12 metadata=1.2 num-devices=5 spares=1 UUID=7916eb13:cd5063ba:a1404cd7:3b65a438 ARRAY /dev/md/md_d13 metadata=1.2 num-devices=5 spares=1 UUID=9a767e04:e4e56a9d:c369d25c:9d333760 ## Partitionable arrays on Tempo controllers: ARRAY /dev/md/md_d20 metadata=1.2 num-devices=5 spares=1 UUID=1d5a3c32:eb9374ac:eff41754:f8a176c1 ARRAY /dev/md/md_d21 metadata=1.2 num-devices=5 spares=1 UUID=38ffe8c9:f3922db9:60bb1522:80fea016 ARRAY /dev/md/md_d22 metadata=1.2 num-devices=5 spares=1 UUID=ebb4ea67:b31b2105:498d81af:9b4f45d3 ARRAY /dev/md/md_d23 metadata=1.2 num-devices=5 spares=1 UUID=da07407f:deeb8906:7a70ae82:6b1d8c4a ------------------------------------- Your suggestions are most welcome ... thanks. Chuck

1 0

Re: [CentOS] CentOS and Marvell SAS/SATA drivers
by Chuck Munro 08 Mar '11

08 Mar '11

On 03/07/2011 09:00 AM, Nico Kadel-Garcia wrote: > > On Sun, Mar 6, 2011 at 10:07 PM, Charles Polisher<cpolish(a)surewest.net> wrote: > >> > https://secure.wikimedia.org/wikipedia/en/wiki/Fakeraid#Firmware.2Fdriver-b… >> > covers fake RAID. > Ouch. That was*precisely* why I used the 2410, not the 1420, SATA > card, some years back. It was nominally more expensive but well worth > the reliability and support, which was very good for RHEL and CentOS. > > I hadn't been thinking about that HostRaid messiness because I read > the reviews and avoided it early. > Here's the latest info which I'll share ... it's good news, thankfully. The problem with terrible performance on the LSI controller was traced to a flaky disk. It turns out that if you examine 'dmesg' carefully you'll find a mapping of the controller's PHY to the "id X" string (thanks to an IT friend for that tip). The LSI error messages have dropped from several thousand/day to maybe 4 or 5/day when stressed. Now the LSI controller is busy re-syncing the arrays with speed consistently over 100,000K/sec, which is excellent. My scepticism regarding SMART data continues ... the flaky drive showed no errors, and a full test and full zero-write using the WD diagnostics revealed no errors either. If the drive is bad, there's no evidence that would cause WD to issue an RMA. Regarding "fake raid" controllers, I use them in several small machines, but only as JBOD with software RAID. I haven't used Adaptec cards for many years, mostly because their SCSI controllers back in the early days were junk. Using RAID for protecting the root/boot drives requires one bit of extra work ... make sure you install grub in the boot sector of at least two drives so you can boot from an alternate if necessary. CentOS/SL/RHEL doesn't do that for you, it only puts grub in the boot sector of the first drive in an array. Chuck

6 5

CentOS 5.x 32bit VPS Ping Issue
by Matt 08 Mar '11

08 Mar '11

I just got an inexpensive VPS too have an outside server to play/test with. I am pinging it every 5 minutes and graphing with MRTG on another CentOS box. This works fine to all servers but the VPS. The first ping to the VPS is always crud and following ones are fine. [root@ns1 scripts]# ping X PING X 56(84) bytes of data. 64 bytes from X: icmp_seq=1 ttl=55 time=773 ms 64 bytes from X: icmp_seq=2 ttl=55 time=42.4 ms 64 bytes from X: icmp_seq=3 ttl=55 time=42.8 ms 64 bytes from X: icmp_seq=4 ttl=55 time=43.1 ms Makes my graph for that one look real bad because it looks at first ping only. Thought about modifying my script to send a warm up ping first but I just don't think I should have to do that or is this a normal thing for a VPS that is pretty much idle?

3 2

what wrong about my ipv6 address
by ann kok 08 Mar '11

08 Mar '11

Hi I used the command "ip -6 addr add 2001:DB8:CAFE:1111::12/64 dev eth0" to add ipv6 address and can see it in ifconfig but can't ping it Why? Thank you # ping6 2001:db8:cafe:1111::12 PING 2001:db8:cafe:1111::12(2001:db8:cafe:1111::12) 56 data bytes >From ::1 icmp_seq=1 Destination unreachable: Address unreachable >From ::1 icmp_seq=2 Destination unreachable: Address unreachable >From ::1 icmp_seq=3 Destination unreachable: Address unreachable >From ::1 icmp_seq=5 Destination unreachable: Address unreachable >From ::1 icmp_seq=6 Destination unreachable: Address unreachable >From ::1 icmp_seq=7 Destination unreachable: Address unreachable >From ::1 icmp_seq=9 Destination unreachable: Address unreachable >From ::1 icmp_seq=10 Destination unreachable: Address unreachable >From ::1 icmp_seq=11 Destination unreachable: Address unreachable

3 3

Enscript
by Hal Davison 08 Mar '11

08 Mar '11

Greetings.. Yes ENSCRIPT is a text to PostScript conversion service. As usual, am a bi confused on how to implement the fit-to-page functionality. Google resources say it is used then proceeds to dance around the issue Using the -f<fontname>@W/H option can one calculate the necessary dimensions for the print job consisting of over 200 pages? --Hal. -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

2 1

BUG: soft lockup CPU stuck for 10seconds (Server went down)
by Roland RoLaNd 08 Mar '11

08 Mar '11

Hello, Today my server stopped responding. i went to the console and on the screen there were a continuous loop of the following info shown on the screen: BUG: soft lockup - CPU#0 stuck for 10s! [java:13959] and alot of other information. ii've took a screen shot of the info shown , you can find it under the following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ and had to hard reset for it to be back up and running. i tried googling with no luck for direct relevant info. so hoping you can help out Thanks, --Roland

6 8

email to web posting software?
by Dave Stevens 07 Mar '11

07 Mar '11

Dear CentOS, I have a user group that would like to be able to routinely post (easily) emails to a web site. Must be usable without special training. I have no experience with this. Anyone have a suggestion? LAMP stack installed. Dave -- When a respected information source covers something where you have on-the- ground experience, the result is often to make you wonder how much fecal matter you've swallowed in areas outside your own expertise. -- Rusty Russell

4 4

Centos 6
by JD 07 Mar '11

07 Mar '11

Any word on approximate release date of Centos 6? Cheers, JD

49 96

OT: grep regex pointer appreciated
by Patrick Lists 07 Mar '11

07 Mar '11

Hi, My grep regex foo is not very good and googling is getting me nowhere so hopefully someone is kind enough to give me some pointers. Goal: grep (non .dbg) filenames and versions from a ftp dir listing and a raw html file: $ wget --no-remove-listing -O ftp-index.txt ftp://127.0.0.1/test/ $ wget --no-remove-listing -O index.html http://127.0.0.1/test/ The relevant parts of the files above (first one is ftp listing, second part is the html file, both copied to test_regex.txt) are: 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.i686.dbg.tgz">bar-4.5.6.i686.dbg.tgz</a> (5551274 bytes) 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.i686.tgz">bar-4.5.6.i686.tgz</a> (5551274 bytes) 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.x86_64.dbg.tgz">bar-4.5.6.x86_64.dbg.tgz</a> (5551274 bytes) 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.x86_64.tgz">bar-4.5.6.x86_64.tgz</a> (5551274 bytes) <tr><td><a href="foo-bar-1.2.3+1.2.3.tar.gz">foo-bar-1.2.3+1.2.3.tar.gz</td></tr> This is what I now have (improvements most welcome): $ egrep -o ">([A-Za-z_-]+)([[:digit:]]{1,3}(\.[[:digit:]]{1,3})*).+(.|t)gz" ./test_regex.txt | grep -v ".dbg" | tr -d '>' Output: foo-bar-1.2.3+1.2.3.tar.gz baz-4.5.6.i686.tgz baz-4.5.6.x86_64.tgz So far so good but now I also want to get the version numbers which I can't figure out. Anyone have a pointer how to get the version number from these filenames (1.2.3+1.2.3 and 4.5.6)? Thanks! Patrick

4 4

IPERF Server
by Matt 07 Mar '11

07 Mar '11

When starting IPERF with "iperf -s" or "iperf -sD" it seems to stop after client runs its first test. I would like to leave it running for a few hours to give someone a chance to run a few tests. Is there a way to leave it active on the server and kill it manually later?

2 1

Re: [CentOS] IP6 Anyone?
by sheraznaz＠yahoo.com 07 Mar '11

07 Mar '11

>> Always learning wrote: >> I always thought, mistakenly, IP6 was 6 segments, because it was IP6. IP4 had 4 segments. However IP6 is >actually IP version 6 and it has 8 segments. I don't think I ever heard IP6, but always IPv6. Counting segments might not be as meaningful. IPv6 has twice (8) segments compared to IPv4 however each segment is 2 octets making IPv6 address space 4 times (128 bits) compared to IPv4 (32 bits). Thanks Sheraz Sent from my Verizon Wireless BlackBerry

9 15

Re: [CentOS] CentOS and Marvell SAS/SATA drivers
by Chuck Munro 07 Mar '11

07 Mar '11

On 03/06/2011 09:00 AM, compdoc wrote: > >> >Regarding the Marvell drivers, I had good luck with the 'sata_mv' driver >> >in Scientific Linux 6 just yesterday, running a pair of 4-port PCIe-x4 >> >Tempo 'Sonnet' controller cards. > Are those the Mac/Windows Sonnet cards that go for less than $200? > > What kind of performance you seeing? Are you doing software raid on them? Yes, those are the cards which target Windows and OS-X, but they work fine on Linux as well. They use the Marvell 88SX series chips. They control 6 2TB WD Caviar Black drives, arranged as 5 drives in a RAID-6 array with one hot spare. 3 drives are connected to each of two cards. mdstat shows array re-sync speed is usually over 100 MBytes/sec although that tends to vary quite a bit over time. > ------------------------------ > On 03/06/2011 09:00 AM, John R Pierce wrote: > > On 03/05/11 7:01 AM, Eero Volotinen wrote: >> > >> > areca works.. >> > >> > > for SAS, I prefer LSI Logic. The Supermicro mobo I'm using (X8DAL-3) has an on-board LSI 1068E SAS/SATA controller chip, although I have the RAID functionality disabled so I can use it as a bunch of drives for software RAID-6. Like the Tempo cards, it has 6 2TB WD SATA drives attached which provides a second set of arrays. Performance really sucks, for some unknown reason, and I get lots of I/O error messages logged when the drives get busy. There appears to be no data corruption, just a lot of retries that slow things down significantly. The LSI web site has no info about the errors. The firmware is passing back I/O abort code 0403 and LSI Debug info related to "channel 0 id 9". There are only 8 ports so I don't know which disk drive may or may not be causing problems. The SMART data on all disks shows no issues, although I tend to treat some SMART data with scepticism. I need to track this error down because my understanding is that the LSI controller chip has very good performance. Chuck

3 3

kernel NETDEV WATCHDOG: eth0: transmit timed out
by sync 07 Mar '11

07 Mar '11

Hi , all : Sometimes my server network connection on Linux goes down with short message in syslog saying: "[localhost kernel] NETDEV WATCHDOG: eth0: transmit timed out" (or similar). By the way , I installed the CentOS 5.4 x86_64 bit and the kernel version was 2.6.18-164. Has anyone experienced this problem or is it the bug of the kernel ? I restart the network and that problem have resolved just now.

5 5

Gnu Screen - terminal issues
by Sean Carolan 07 Mar '11

07 Mar '11

I really like gnu screen and use it everyday but there's one thing that is a bit inconvenient, and that's the odd line wrapping and terminal size issues that seem to pop up. The problem crops up when I type or paste a really long command, and then go back and try to edit it; the text starts to wrap over itself and you have no idea what you are editing. Any fixes for this?

9 33

Updating hardware clock from cron
by Kenneth Porter 06 Mar '11

06 Mar '11

Is there a package to do this? Normally the hardware clock is set during shutdown if one is running ntpd. But if a long-running server shuts down unexpectedly, this isn't done, and the hardware clock might be off by a lot when it comes back up. So setting it periodically from a cron job could be useful. What do others do? Adding a one liner to /etc/cron.daily that invokes /etc/rc.d/init.d/ntpd would do it but it seems heavyweight to restart ntpd. Alas, the script doesn't export just the sync_hwclock function.

5 5

Problem burning dvd's
by Jimmy Bradley 06 Mar '11

06 Mar '11

I have a question on burning dvd iso's, using k3b. I have a sony dvd rw, and I've burned cd's with now problem, including iso's. The problem I'm having is, when I burn a dvd iso, k3b says it's a success, but then when I re-insert the disk, the drive tries to read the disk, but the read/write light just stays on, and the drive can't access the disk. Am I leaving a step out, or something? I burn cd iso's all the time. Thanks Jim

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[Fwd: Re: Centos 6 - What are you looking forward to?]
by James B. Byrne 05 Mar '11

05 Mar '11

On Fri, March 4, 2011 14:12, aurfalien(a)gmail.com wrote: > On Mar 4, 2011, at 11:07 AM, Kenneth Porter wrote: > >> --On Thursday, March 03, 2011 10:11 AM -0500 Digimer >> <linux(a)alteeve.com >> > >> wrote: >> >>> How about the rest of you? What are you looking forward to in >>> CentOS 6 when it is released? >> >> A new Ruby > > +1 I solved this problem on my 5.5 servers in the following manner: login: not_as_root_user . . . $ # Add rpmforge repos to yum per: $ # http://wiki.centos.org/AdditionalResources/Repositories/RPMForge $ sudo yum install checkinstall $ wget ftp://ftp.ruby-lang.org/pub/ruby/ruby-1.8.7-p334.tar.gz $ # to get latest or most desired source change version as required $ tar -xzf ruby-1.8.7-p334.tar.gz $ # expand source archives in /tmp $ cd ruby-1.8.7-p334 $ # change to source directory $ ./configure $ # configure makefile for this host $ make $ # build the Ruby VM $ checkinstall $ # package ruby VM and suppport files as an RPM package $ sudo yum localinstall \ /usr/src/redhat/RPMS/i386/ruby-1.8.7-p334-1.i386.rpm \ --nogpgcheck $ # install the rpm package from the checkinstall location -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3 -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Will CentOS become obsolete now because of the changes Red Hat is implementing?
by Rudi Ahlers 05 Mar '11

05 Mar '11

This post appeared on another forum: Will CentOS become obsolete now because of the changes Red Hat is implementing? Red Hat has changed the way it distributes Enterprise Linux kernel code in an effort to prevent Oracle and Novell from stealing its customers, making it more difficult for these competitors to understand which patches have been applied where. Some have speculated that the change is designed to make it harder for Oracle as well as the open source CentOS project to build their own Linux distributions. But Stevens says this is not the case. He says the change is meant to hamper Oracle and Novell's ability to offer support to customers who are already running Red Hat Enterprise Linux (RHEL). "We made the change, quite honestly, because we are absolutely making a set of steps that make it more difficult for competitors that wish to provide support services on top of Red Hat Enterprise Linux," Red Hat chief technology officer Brian Stevens tells The Register, before naming those competitors. "Today, there are two competitors that I'm aware of that go to our customers directly, offering to support RHEL directly for them...Oracle and Novell." In essence, Red Hat is trying to hide information from these competitors that is essential to providing support for RHEL specifically. "What we're trying to impede is competitors that come to customers who are already running RHEL under subscription from Red Hat and saying 'Don't pay Red Hat anymore, pay us, and don't make any changes to your systems'," Stevens says. He insists that the change does not violate either the letter or the spirit of RHEL's GPL open source license. "We were very careful that what we've done does not impede what our customers need to accomplish or what the community needs to accomplish." And he says that the change would not really hamper the development of other Linux distros, including CentOS. "We haven't at all restricted CentOS's ability to grab source code and recompile it and clean-out trademarks and package it. It's just some of the knowledge of the insides that we're hiding," he explains. One longtime CentOS developer agrees. "I'll not lose sleep on the matter," CentOS co-founder Russ Herold tells The Reg. In November, with the release of Red Hat Enterprise Linux 6, the company released its kernel package with all patches pre-applied. "In the past, we distributed the kernel as a base file and then a set of add-on patches that accompany it. Then when you did a build, the build process automatically applied all those patches to the kernel file," Stevens says. "Now, we integrate those patch files directly into that kernel. We do the first part of the build process prior to distribution." This was recently noticed by kernel-community member and LWN editor Jonathan Corbet, who took issue with the change, calling Red Hat's package "obfuscated" kernel source code. "Distribution in this form should satisfy the GPL, but it makes life hard for anybody else wanting to see what has been done with this kernel," Corbet wrote. "Hopefully it is simply a mistake which will be corrected soon." Others speculated that the move would undermine not only Oracle's Unbreakable Linux, but also CentOS. Both are based on RHEL. CentOS is meant to be a RHEL clone. Whereas the compiled bits of Red Hat Enterprise Linux are only available under a Red Hat paid subscription, CentOS is completely free. "The changes will make work harder for distributions such as CentOS, the community-built Linux distribution ... based on Red Hat's sources," H Online said. "CentOS is built from the RHEL source by a limited number of volunteers and Red Hat's change in policy will mean more work for them unless more volunteers or other companies step in and provide them with assistance." We heard similar noises from an experienced Linux kernel developer. He said that Red Hat's change was like shuffling all the cards in an old fashioned Dewey Decimal library file system – the card you want is still there, but finding it is no easy task – and that this would cause problems for CentOS, which is an economic threat to Red Hat. But CentOS founder Russ Herold insists the change is not a big issue. "Private local trial builds of the released RHEL 6 sources by me and others have proceeded with no major problems. I just do not see that the changes as some earth-shattering change. I just think [the patches will be] incrementally more difficult to figure out," he says. "Nothing in Red Hat's new approach prevents a person from running a local version-control system, containing the pristine kernel at point A, and the Red Hat variant which we might call point B. Then one runs a 'diff' in that version-control system between A and B, and starts reading the diffs to see what is happening. Over time, both the pristine kernel, and the patched Red Hat versions will vary, and one will get a sense for which 'diff' parts matter, and which are cosmetic cleanups." Other distros will not be affected, Red Hat's Stevens says, because the company distributes its kernel changes upstream as well. "The work that we've done should not impede companies from building their own versions of Linux and supporting those for their customers," he says. "All the code we deliver through RHEL is out there. In most cases, the changes that go into RHEL. We already distribute into the upstream kernel. We have an upstream-first policy, where we're developing openly and then later integrating into our tree and then delivering it. So it shouldn't at all impede the community or anybody that's in the business of competing on that." Red Hat, he reiterates, is trying to keep RHEL-specific knowledge away from Oracle and Novell. With past RHEL kernel-code distributions, the patches mapped to articles in Red Hat's knowledge base. "It makes competitors do heavy lifting," he says. "If you want to support RHEL, remove the trademarks, and do some heavy lifting. If nothing else, it causes competitors to have to invest." This won't hamper CentOS, he says, because CentOS isn't in the support business. "The code is still available. It's just more difficult to support the distro as a commercial entity. CentOS is not in the support business." Oracle and Novell are in the support business. And whatever collateral damage was caused by Red Hat's change in policy, one thing is for sure. On some level, it will indeed be more difficult for Oracle and Novell to pilfer the company's customers. Full story here : http://www.channelregister.co.uk/201...ode_packaging/ Can any of the CentOS team please comment on this? P.S. I don't want to put extra pressure on you guys seeing as the recent conversations about Centos 5.6 & CentOS 6 have done enough damage already, but it would be interesting to know what the future of CentOS is like with RedHat's change -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Re: [CentOS] CentOS and Marvell SAS/SATA drivers
by Chuck Munro 05 Mar '11

05 Mar '11

On 03/04/2011 09:00 AM, Les Mikesell wrote: > > On 3/3/11 6:52 PM, Chuck Munro wrote: >> > >> > I've been on a real roller coaster ride getting a large virtual host up >> > and running. One troublesome thing I've discovered (the hard way) is >> > that the drivers for Marvell SAS/SATA chips still have a few problems. >> > >> > After Googling around quite a bit, I see a significant number of others >> > have had similar issues, especially evident in the Ubuntu forums but >> > also for a few RHEL/CentOS users. >> > >> > I have found that under heavy load (in my case, simply doing the initial >> > sync of large RAID-6 arrays) the current 0.8 driver can wander off into >> > the weeds after a while, less so for the older 0.5 driver in CentOS-5. >> > It would appear that some sort of bug has been introduced into the newer >> > driver. >> > >> > I've had to replace the Marvell-based controllers with LSI, which seem >> > rock solid. I'm rather disappointed that I've wasted good money on >> > several Marvell-based controller cards (2 SAS/SATA and 2 SATA). > > I replaced separate SII and promise controllers with a single 8-port Marvell > based card and thought it was a big improvement. No problems with centos5.x, > mostly running RAID1 pairs, one of which is frequently hot-swapped and > re-synced. I hope its not going to have problems when I upgrade. > Since I have the luxury of time to evaluate options, I've just downloaded Scientific Linux 6 to see what happens with either the mvsas or sata-mv driver. This is my first experience with SL but I wanted native ext4 rather than the preview version in CentOS-Plus. Even if I stick with SL-6 as the KVM host, I'll continue using CentOS as guest machines. If the Marvell drivers don't pan out, it looks like I'll have to either spend money on a 3Ware|LSI|Promise controller or revert to CentOS-Plus 5.5 for ext4. SL-6 is installing as I write this. Chuck

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Re: [CentOS] CentOS and Marvell SAS/SATA drivers
by Chuck Munro 05 Mar '11

05 Mar '11

On 03/05/2011 09:00 AM, Nico Kadel-Garcia wrote: > > On Fri, Mar 4, 2011 at 4:16 PM, compdoc<compdoc(a)hotrodpc.com> wrote: >>> >>If the Marvell drivers don't pan out, it looks like I'll have >>> >>to either spend money on a 3Ware|LSI|Promise controller >> > >> > The 3ware are excellent... > And Promise, historically, is*not*. > > Yes, I've had problems with Promise cards in the past, but haven't bought any for a long time. They seem to be moving upscale these days. Regarding the Marvell drivers, I had good luck with the 'sata_mv' driver in Scientific Linux 6 just yesterday, running a pair of 4-port PCIe-x4 Tempo 'Sonnet' controller cards. So it appears someone has fixed that particular driver. I've decided to stick with those cards rather than re-install the Supermicro/Marvell SAS/SATA 8-port controllers, which use the 'mvsas' driver that I had problems with on the RHEL-6 evaluation distro. So far, SL-6 has performed very well, all RAID-6 arrays re-synced properly, and running concurrent forced fscks on eight arrays was very fast (because the ext4 filesystems were still empty :-) ). I think I'll stick with SL-6 as the VM host OS, but will use CentOS for the guest VMs. CentOS-5.x will do fine for now, and I'll have the luxury of upgrading guest OSs to CentOS-6 as the opportunity arises. Chuck

2 1

bind 9.7.3 and libp11 engine_pkcs11 of fedoca core 14
by fakessh ＠ 05 Mar '11

05 Mar '11

hello list centos. I installed the packages libp11 and engine_pkcs11 of fedora core 14 on my centos 5.5 to allow me to compile the latest version of bind. this is the only way I found to compile bind 9.7.3. you know another way to compile bind 9.7.3 on centos 5.5 thanks for all your return -- gpg --keyserver pgp.mit.edu --recv-key 092164A7 http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7

3 3

Re: [CentOS] Gnu Screen - terminal issues
by Nico Kadel-Garcia 05 Mar '11

05 Mar '11

On Sat, Mar 5, 2011 at 12:50 AM, Larry Vaden <vaden(a)texoma.net> wrote: > On Fri, Mar 4, 2011 at 6:46 PM, Nico Kadel-Garcia <nkadel(a)gmail.com> wrote: >> >> It's default behavior for the Nomachine Windows client. When you close >> it, it asks if you want to "disconnect" or "terminate" the session. >> Whether it works well is heavily dependent on the server, whether >> Neatx, FreeNX, or the NoMachine server. > > Please extend your remarks about which server you think is best and why. > > thanks/ldv Larry, please check the archives. I already covered that.

1 0

Re: [CentOS] HOW to REDIRECT to HTTPS?
by Kai Schaetzl 05 Mar '11

05 Mar '11

Ralph Angenendt wrote on Thu, 3 Mar 2011 16:26:29 +0100: > Hope I remember it this evening. No real access to the CentOS mail stuff > from here :) Hi Ralph, wollte nochmal an das unsubscribe erinnern. Es ist: from: erikmccaskey64 <erikmccaskey64(a)zoho.com> Schöne Grüße, Kai

1 0

IPTABLES rule for separating users
by erikmccaskey64 05 Mar '11

05 Mar '11

I have an OpenWrt 10.03 router [ IP: 192.168.1.1 ], and it has a DHCP server pool: 192.168.1.0/24 - clients are using it through wireless/wired connection. Ok! Here's the catch: I need to separate the users from each other. How i need to do it: by IPTABLES rule [ /etc/firewall.user ]. Ok! "Loud thinking": So i need a rule something like this [on the OpenWrt router]: - DROP where SOURCE: 192.168.1.2-192.168.1.255 and DESTINATION is 192.168.1.2-192.168.1.255 The idea is this. Ok! Questions! - Will i lock out myself if i apply this firewall rule? - Is this a secure method? [ is it easy to do this?: hello, i'm a client, and i say, my IP address is 192.168.1.1! - now it can sniff the unencrypted traffic! :( - because all the clients are in the same subnet! ] - Are there any good methods to find/audit for duplicated IP addresses? - Are the any good methods to find/audit for duplicated MAC addresses? - Are there any good methods to do this IPTALBES rule on Layer2?: `$ wget -q "http://downloads.openwrt.org/backfire/10.03/ar71xx/packages/" -O - | grep -i ebtables` `$ ` p.s.: The rule would be [is it on a good chain?]: iptables -A FORWARD -m iprange --src-range 192.168.1.2-192.168.1.255 --dst-range 192.168.1.2-192.168.1.255 -j DROP Thank you!

3 2

KVM Question
by William Warren 05 Mar '11

05 Mar '11

I'm curious exactly how KVM works. If i see things right it's virtualization that's still within a full base operating system load correct? How does KVM perform against VMware which uses a much smaller footprint? Is KVM really a hypervisor? I'm just trying figure out the basics of KVM..:) Thanks, William Warren

2 1

Re: [CentOS] Updating hardware clock from cron
by Matt 04 Mar '11

04 Mar '11

> Is there a package to do this? > > Normally the hardware clock is set during shutdown if one is running ntpd. > But if a long-running server shuts down unexpectedly, this isn't done, and > the hardware clock might be off by a lot when it comes back up. So setting > it periodically from a cron job could be useful. > > What do others do? Adding a one liner to /etc/cron.daily that invokes > /etc/rc.d/init.d/ntpd would do it but it seems heavyweight to restart ntpd. > Alas, the script doesn't export just the sync_hwclock function. I add this to /etc/rc.local /usr/sbin/ntpdate us.pool.ntp.org Sets the clock on start up. Might run it by cron once a month or so too.

6 8

top and allocation issues
by Michael D. Berger 04 Mar '11

04 Mar '11

In a context where exceptions are caught, I ran the fragment: cerr << "allocating" << endl; char* arr[100]; for (int jj = 0; jj < 10; ++jj) { cerr << "jj = " << jj << endl; arr[jj] = new char[2000000000]; sleep (30); } sleep (10); for (int jj = 0; jj < 10; ++jj) delete[] arr[jj]; cerr << "deleted" << endl; The exception was caught with jj = 1, i.e., on the second allocation. But on top, I see: top - 14:08:46 up 5:21, 10 users, load average: 0.04, 0.06, 0.08 Tasks: 158 total, 1 running, 157 sleeping, 0 stopped, 0 zombie Cpu(s): 2.7%us, 2.0%sy, 0.0%ni, 94.5%id, 0.6%wa, 0.1%hi, 0.1%si, 0.0%st Mem: 1941908k total, 1231804k used, 710104k free, 138372k buffers Swap: 3899384k total, 0k used, 3899384k free, 876020k cached and the "710104k free" suggests that I should have failed on the first allocation. Furthermore, the allocation did not alter the values in top (except for a little jitter). Wherein do I err? [~]$ uname -a Linux xxxxx 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:53:09 EST 2011 i686 i686 i386 GNU/Linux Thanks, Mike.

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virtualization on the desktop a myth, or a reality?
by Rudi Ahlers 04 Mar '11

04 Mar '11

I am busy setting up some XEN servers on a SAN for high availability and Cloud Computing, and thought it could be cool to setup virtualization on a CentOS 5.5 Desktop, running on a Core i3 + 4GB RAM, and use the SAN's storage to see if it could actually be worth my while to replicate a Cloud Computing setup in the office. And, cause I got a bit bored waiting for a few RAID-sets to finish initializing. So, I installed CentOS + KDE, chose the Virtualization package and used Virtual Machine Manager to setup another CentOS VM inside CentOS (I only have a CentOS ISO on this SAN, since we don't use Debian / Slackware / FC / Ubuntu / etc). The installation was probably about the same speed as it would be on raw hardware. But, using the interface is painfully slow. I opened up Firefox and browsed the web a bit. The mouse cursor lagged a bit and whenever I loaded a slow / large website, it seemed asif the whole VM lagged behind. The Virtual Machine didn't use much resources. I allocated 1CPU core & 512MB RAM to it Yes, I know that I could have used KVM, VMWare or VirtualBox, but I wanted to use what's included already. Cause, let's face it, many people (even though they're technically advanced users) don't know virtualization. And, granted, when we install Virtual Machines on a XEN server, we don't ever use X since the servers we run as web / email / database / file servers, so there's no need for X. BUT, I want(ed) to see if this is a reality for the average desktop user, or not really (yet?) seeing as most modern PC's have far more CPU & RAM resources than what is actually needed by most. I'm not talking about developers / graphic designers / etc. I'm talking about Bob, who uses his PC for email, internet, document writing, etc and needs to boot into Windows if he feels like playing Warcraft III or StarCraft II, or use Pastel, etc. Wouldn't it be nice to run Windows, of for that matter Solaris / FreeBSD / MAC (graphics designer) / another flavor of Linux / etc inside your favorite Linux, and access it from the Desktop without too much trouble? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

18 40

Xen stack scheme
by Jussi Hirvi 04 Mar '11

04 Mar '11

I need to restructure my server farm from tower PC:s to a minimal amount of 1U rack servers. I am going to rely on xen virtualization, as KVM seems not to be very mature yet. My current problem is the mail server, which uses a lot of CPU and I/O. A dedicated machine would be the best option. But would there be any sense in this: - run the mail server in xen dom0 (to get full native performance) - append a couple of light-weight servers as domU:s (like name server) - Jussi Hirvi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi(a)greenspot.fi * http://www.greenspot.fi

5 6

CentOS-announce Digest, Vol 73, Issue 2
by centos-announce-request＠centos.org 04 Mar '11

04 Mar '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2011:0219 Low CentOS 4 i386 and x86_64 EOL Notice (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 03 Mar 2011 19:53:46 -0600 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2011:0219 Low CentOS 4 i386 and x86_64 EOL Notice To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <4D70462A.9060308(a)centos.org> Content-Type: text/plain; charset="iso-8859-1" CentOS Errata and Security Advisory CESA-2011:0219 This is the 1 year notification for the End of Life for the CentOS 4 distribution. The upstream provider will discontinue public updates of their EL4 product on February 29th, 2012. The CentOS Project will end support for CentOS 4 on the same date. CentOS 4, as well as all previously released versions of CentOS, will continue to be available in the Centos Vault: http://vault.centos.org/ This CESA includes a new centos-release file that reminds you of the February 29th, 2012 end of life date. Users still running production workloads on CentOS 4 are advised to begin planning the upgrade to CentOS 5 or (when available) CentOS 6 before the EOL date. For users who are unable to migrate off the EL 4 code base before its end-of-life date, the upstream provider intends to offer a limited, optional extension program. The CentOS Project recommends that you contact their sales team for a price quote for their extended service if you can not move to a newer code base before February 29th, 2012. x86_64: centos-release-4-9.1.x86_64.rpm i386: centos-release-4-9.1.i386.rpm src: centos-release-4-9.1.src.rpm

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