- Discuss - lists.centos.org

Configuring a cluster
by Johnny H 08 Feb '11

08 Feb '11

Dear Centos users, I am not sure if this the correct place to post but it seems sensible. I have an 8 node cluster which I want to install/configure Centos. As I am not a sys-admin, can anyone advise me on what I should do? Any suggestions appreciated. Thank you.

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SSH AllowUser WildCard
by Stephen Cox 08 Feb '11

08 Feb '11

Is it possible to allow a user to login from an changing hostname like: username(a)*hoststringfixed.com -- Stephen Cox

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How and when are the sound modules loaded at system boot time on CentOS 5?
by James Pearson 08 Feb '11

08 Feb '11

I've been trying to work out how the various sound modules get loaded at boot time on CentOS 5 - but I can't find anything obvious under /etc/rc.d/ CentOS 4 did this in /etc/rc.d/rc.sysinit - but there is nothing equivalent in CentOS 5 Does anyone know how these modules get loaded? Thanks James Pearson

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premature question on 5.6
by Jerry Geis 08 Feb '11

08 Feb '11

What will be the correct way to migrate ext3 to ext4 going from 5.5 to 5.6? Will something after the update ask if you want to migrate the file systems? Looking forward to some file system speed ups with large files. Thanks Jerry

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Is there a Centos 3 around ?
by Nicolas Ross 08 Feb '11

08 Feb '11

Hi ! I think one of my machine got hacked, but I can figure out from where... I found some suspicious file in /bin and /usr/bin directories that are owned by user id 122, where this machine doesn't a userid 122. So, does anyone hav a centos 3.9 install arround that can send me the info about (filesize, md5, modification date) these file : /bin : ls netstat ps /usr/bin/ dir find md5sum pstree slocate tee top What tiped me off, I was sudoing to another user, and swas this message : "Unknown HZ value! (92) Assume 100." Thanks

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RHEL 6 <-> CentOS 6 ?
by Nicolas Ross 07 Feb '11

07 Feb '11

Hi ! We are curently deploying an 8 nodes cluster where we have a RHEL 6 license at great costs (~14 k$/y). It will be our new production environment for mission-critical services. Now our aging developpement server (old p4 with 1.5 gig of ram) need to be updated. We will be installing on hardware as close as possible to the new production servers, just not in a rack... For the developement server, I won't be needing the RH support (and price that goes with it). So I wsish to install it under CentOS. But 6 isn't out yet. (by the way, when ;-) ?). I do have a spare slot in my rhn that I can install the new server with. Will RHEL 6 be as easy to switch to CentOS 6 as were RHEL/CentOS 5 ? That is install a couple of rpms, yum update and voilà ? Thanks,

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Re: [CentOS] Fan speed control on Supermicro X8DAL board with CentOS
by Chuck Munro 07 Feb '11

07 Feb '11

On Sun, 06 Feb 2011 12:09:12 +0000 Ned Slider wrote: > > On 06/02/11 07:00, Chuck Munro wrote: >> > Hello folks, >> > >> > I'm having a difficult time trying to figure out why the CPU cooling >> > fans run at full speed on my Supermicro X8DAL-3 motherboard. There >> > doesn't seem to be any variable speed (the fans are PWM compatible) ... >> > they either idle at almost nothing, or suddenly burst into a >> > high-pitched scream that gets my ears bleeding after a few seconds. >> > Once they jump to warp-10, they remain there. >> > >> > The "Super-I/O" chip on this board is a Winbond W83627DHG which does the >> > temperature and voltage monitoring. >> > >> > Is anyone aware of which driver or kernel module I need for that chip in >> > order to get control of the fans? The Supermicro web site and the >> > board's manual aren't any help. Fresh installs of CentOS-5.5 and RHEL-6 >> > don't exert any control by default. Installing the lm_sensors package >> > and probing with the 'sensors' command didn't help either. >> > >> > Slowly going deaf ....... >> > >> > Chuck > > Hi Chuck, > > The correct kernel module for your chipset is w83627ehf.ko. I'm not sure > the driver actually controls fan speed, I thought it was more for > monitoring (fan speeds, temps, voltages) but I could be wrong. My > current system (not a Supermicro) controls variable fan speed from > options within the BIOS. I can enable/disable fan speed control and > select either voltage or PWM based control. > > The stock w83627ehf driver in RHEL5.5 is oldish (they were updated in > 5.5 I think but are still over a year old now). ELRepo.org have an > updated driver available (kmod-w83627ehf) based on a backport from > kernel-2.6.34. I've just checked upstream and a few more patches have > been committed since kernel-2.6.34 and the current kernel-2.6.37 so I'll > look at updating the elrepo driver with those latest patches. > > Hope that helps. > > Thanks Ned! I did go through the board's BIOS menus several times and could find only one fan control option, which ranges from always-fast for maximum performance to almost-silent for workstation use. No matter what the setting, the fans may start out slow but eventually jump to high speed. Updating the BIOS to the latest version made no difference. I also noticed that at all times the BIOS reports the CPU temperatures as "Low" no matter what the fan speed. The coolers are always cold to the touch. I sure hope I don't have a defective board ... it's a royal pain to have to remove one from a large server. I booted Ubuntu but the live-CD version doesn't have a working 'fancontrol' utility. I'd be tempted to install Ubuntu Server but I much prefer staying with CentOS and KVM to match all of the guest virtual machines it'll be running. Time to go through the mobo manual with a fine-tooth comb. :-) Chuck

3 2

Autorun is VERY bad
by kellyremo 07 Feb '11

07 Feb '11

How to disable autorun? Are there any hidden autorun features on a standard CentOS install?? http://securitytube.net/USB-Autorun-attacks-against-Linux-at-Shmoocon-2011-…

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system clock
by Buz Davis 07 Feb '11

07 Feb '11

I am running CntOS 5 with Gnome. Every now and then I have noticed that the computer will somehow get the time wrong by several hours. Is there a simple way to adjust the time? So far the only way I have found is to boot into windows (it is a dual boot system), make the change there, and then get back into CentOS. Older versions of Red Hat and Fedora let you do it by right-clicking on the time display, if I recall correctly, but setting the time isn't one of the options in CentOS. Thanks Buz Davis

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RHEL/Centos6 handling disks w/4k sectors?
by Les Mikesell 07 Feb '11

07 Feb '11

Does anyone know if 4k sectors will be handled better by the kernel in Centos6? I'd like to copy backups to a 750Gb laptop type drive for offsite storage but the best write speed I can get is about 8MB/sec even with dd to the raw disk which shouldn't have an issue with partition alignment. -- Les Mikesell lesmikesell(a)gmail.com

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selenium rc server - run it on a specific display help!
by Roland RoLaNd 07 Feb '11

07 Feb '11

Dear all, i'm trying to run multiple selenium rc server on a centos box (different ports) with developers connecting to it through VNC (different respective ports) to check their automated test result. i can easily do the above manually (when it comes to running RC server). though automating the process is proving to be difficult. can anyone guide me on how to run a service on a specific display in an automated process? right now if i connect to a vnc session (any port) and i run it manually through iterm, it works normally. though setting an cron job that does the above, isnt working (rc opens in shell instead of on each dev's assigned display)

2 2

OpenSSH could be faster...then why don't they path it??
by kellyremo 07 Feb '11

07 Feb '11

https://www.psc.edu/networking/projects/hpn-ssh/hpn-v-ssh-tput.jpg "SCP and the underlying SSH2 protocol implementation in OpenSSH is network performance limited by statically defined internal flow control buffers. These buffers often end up acting as a bottleneck for network throughput of SCP, especially on long and high bandwith network links. Modifying the ssh code to allow the buffers to be defined at run time eliminates this bottleneck. We have created a patch that will remove the bottlenecks in OpenSSH and is fully interoperable with other servers and clients. In addition HPN clients will be able to download faster from non HPN servers, and HPN servers will be able to receive uploads faster from non HPN clients. However, the host receiving the data must have a properly tuned TCP/IP stack." My question is: So Why Does the original OpenSSH has "limited statically defined internal flow control buffers"?? It could be way faster, even 10x!! With the HPN-SCP path it could be the descendant of FTP! Why aren't there any ""OpenSCP packages""? ('normal SCP+HPN-SCP path+no local user needed for SCP'ing+chroot by default') Any opinions? Thank you!

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if the file changes send email about diff
by kellyremo 06 Feb '11

06 Feb '11

I have 2 script. Script "A", Script "B". Script "A" is regulary watching the "dhcpacks" [dhcp release is configured to 2mins] in the logs, for the past 2 minutes. it writes the MAC addresses to a file [/dev/shm/dhcpacks-in-last-2min.txt] every 2 minutes. Ok, this is working, active clients are in this file. Super! Script "B": http://pastebin.com/raw.php?i=wvhwhPWu I'm trying to create a script, that watches the changes in "/dev/shm/dhcpacks-in-last-2min.txt" file [in every 1 sec]. Ok. But: my "watcher" script [the pastebined] is not working fine...sometime it works, sometime it send that someone "XY logged out", but it's not true! nothing happened, and the problem is not in the Script "A". Can someone help me point out, what am i missing? How can i watch a file [in every sec], that contains only MAC addresses, and if someone doesn't get dhcpack in 2 minutes, the file "/dev/shm/dhcpacks-in-last-2min.txt" changes, and that clients MAC address will be gone from it, and i need to know, who was it [pastebined my script..but somethings wrong with it]. Thank you for any help..i've been pathing my script for days now.. :\

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future version of bind for el5
by fakessh ＠ 06 Feb '11

06 Feb '11

hello all the people I'd call http://people.redhat.com/ atkac ~ / official member of the team redhat for news of future versions of bind 9.7 for el5 sincerely -- gpg --keyserver pgp.mit.edu --recv-key 092164A7 http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7

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Fan speed control on Supermicro X8DAL board with CentOS
by Chuck Munro 06 Feb '11

06 Feb '11

Hello folks, I'm having a difficult time trying to figure out why the CPU cooling fans run at full speed on my Supermicro X8DAL-3 motherboard. There doesn't seem to be any variable speed (the fans are PWM compatible) ... they either idle at almost nothing, or suddenly burst into a high-pitched scream that gets my ears bleeding after a few seconds. Once they jump to warp-10, they remain there. The "Super-I/O" chip on this board is a Winbond W83627DHG which does the temperature and voltage monitoring. Is anyone aware of which driver or kernel module I need for that chip in order to get control of the fans? The Supermicro web site and the board's manual aren't any help. Fresh installs of CentOS-5.5 and RHEL-6 don't exert any control by default. Installing the lm_sensors package and probing with the 'sensors' command didn't help either. Slowly going deaf ....... Chuck

2 1

Significant speedup of package building with mock from EPEL for RHEL 6, should definitely go in CentOS 5
by Nico Kadel-Garcia 05 Feb '11

05 Feb '11

The speedups in building RPM's with "mock" from the EPEL packages for RHEL 6 are *profound*, especially if your environment is like mine and you have thousands of user id's. The issue seems to be the handling of "/var/log/lastlog" and similar files, which are otherwise quite large and take significant time to compress and uncompress when laying out new mock environments. Karabhir, what are the odds of encouragng a switch to http://mirrors.kernel.org/fedora-epel/6/mock-1.1.8-1.el6.src.rpm, and backporting it to centos/5/5/extras ? It's working very well for me, and I think it would be a helpful improvement in RPM building for both the CentOs 5.6 and CentOS 6 efforts.

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x25 line xterm
by Hal Davison 05 Feb '11

05 Feb '11

Noted that xterm by default uses 24 lines per window. I have reviewed /etc/termcap looking for a specific entry for xterm that I can edit to change the ln#24 to ln#25 for our application. When I used RedHat there was an editable option to change the number of displayable lines as is done in putty. Any suggestions? --Hal. -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

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CentOS 6.0 alpha testers
by valent.turkovic＠gmail.com 05 Feb '11

05 Feb '11

Hi guys, who do I need to contact to become CentOS tester? When is first alpha due for release and testing? Cheers, Valent. -- follow me - www.twitter.com/valentt & http://kernelreloaded.blog385.com linux, anime, spirituality, wireless, scuba, linuxmce smart home, zwave ICQ: 2125241, Skype: valent.turkovic, MSN: valent.turkovic(a)hotmail.com

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LiveCD System recovery - Mounting LVM?
by Johan Martinez 05 Feb '11

05 Feb '11

Hi, I am trying to recover data from my old system which had LVM. The disk had two partitions - /dev/sda1 (boot, Linux) and /dev/sda2 (Linux LVM). I had taken a backup of both partitions using dd. Now I am booting of CentOS live cd for system restore. I recreated partitions like previous system using fdisk and then used dd to dump all the data onto it. I would like to mount sda2 as LVM, but I don't know how to do that. Any steps or howto mount LVM manually would be really helpful. I think I can recover the system once I am able to access sda1 and sda2. Any help? jM.

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Unable to connect to wireless network
by Jatin 05 Feb '11

05 Feb '11

Hi CentOS users I just installed the CentOS 5.5 version on my toshiba laptop. I did the configuration that i had for the wireless settings but still i could not connect to my home wireless network. So someone please guide me on how i can connect my laptop to my wireless home network. Thanks Jatin

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compiz install on centos 5.2
by sylvan.dcunha＠gmail.com 04 Feb '11

04 Feb '11

Dear All, I know this not the right place but guess someone out in this forum will defuinately be kind enogh to advise and help me and would highly apprecite that I am new to compiz and have installed compiz but its does not work .. as it gives the following error when i run it Installed compiz as per this document http://azlan.anilezfa.com/install-compi ... nux-centos but get the following error when i run fusion-icon ------------------- * Detected Session: unknown * Searching for installed applications... Backend : ini Integration : true Profile : default Adding plugin decoration (decoration) Initializing decoration options...done * No GLX_EXT_texture_from_pixmap with direct rendering context ... nor with indirect rendering, this isn't going to work! * Using the GTK Interface * Starting Compiz ... executing: compiz --replace --sm-disable --ignore-desktop-hints ccp compiz (core) - Fatal: No composite extension ------------------------- I am using the following Centos 5.2 final vga vard is VGA compatible controller: nVidia Corporation NV6 [Vanta/Vanta LT] (rev 15) my xorg.conf is as below Section "ServerLayout" Identifier "Default Layout" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection Section "Device" Identifier "Videocard0" Driver "nv" EndSection Section "Screen" Identifier "Screen0" Device "Videocard0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection Start x works fine and am able to use the GUI perfectly Really would apprecite your kind help and advice.. the computer has a on board display card thanks and regards sylvan

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Re: [CentOS] Unable to connect to wireless network
by leeodraper＠googlemail.com 04 Feb '11

04 Feb '11

Hello Jatin This might mean that you don't have the drivers for the wireless card installed. My laptop has a button that when press switches the wireless card on and a LED turns blue. If I don't have the drivers installed then the light does not turn blue. Lee ------Original Message------ From: Jatin Sender: centos-bounces(a)centos.org To: centos(a)centos.org ReplyTo: CentOS mailing list Subject: [CentOS] Unable to connect to wireless network Sent: 4 Feb 2011 16:15 Hi CentOS users I just installed the CentOS 5.5 version on my toshiba laptop. I did the configuration that i had for the wireless settings but still i could not connect to my home wireless network. So someone please guide me on how i can connect my laptop to my wireless home network. Thanks Jatin _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos Sent from my BlackBerry® wireless device

1 0

CentOS-announce Digest, Vol 72, Issue 1
by centos-announce-request＠centos.org 04 Feb '11

04 Feb '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-2011:0170 Moderate CentOS 4 i386 libuser - security update (Tru Huynh) 2. CESA-2011:0170 Moderate CentOS 4 x86_64 libuser - security update (Tru Huynh) 3. CESA-2011:0180 Moderate CentOS 4 i386 pango - security update (Tru Huynh) 4. CESA-2011:0180 Moderate CentOS 4 x86_64 pango - security update (Tru Huynh) 5. CESA-2011:0181 Important CentOS 4 i386 openoffice.org and openoffice.org2 - security update (Tru Huynh) 6. CESA-2011:0181 Important CentOS 4 x86_64 openoffice.org and openoffice.org2 - security update (Tru Huynh) 7. CESA-2011:0197 Moderate CentOS 4 i386 postgresql - security update (Tru Huynh) 8. CESA-2011:0197 Moderate CentOS 4 x86_64 postgresql - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Fri, 4 Feb 2011 11:41:22 +0100 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2011:0170 Moderate CentOS 4 i386 libuser - security update To: centos-announce(a)centos.org Message-ID: <20110204104122.GA24321(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2011:0170 libuser security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2011-0170.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/libuser-0.52.5-1.1.el4_8.1.i386.rpm updates/i386/RPMS/libuser-devel-0.52.5-1.1.el4_8.1.i386.rpm source: updates/SRPMS/libuser-0.52.5-1.1.el4_8.1.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update libuser Tru -- Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

1 0

yum confusion...
by John Doe 04 Feb '11

04 Feb '11

Hi, I just installed a new server and my final yum update fails... I have rpmforge and rpmforge-extras, but with yum priorities... # grep enabled /etc/yum/pluginconf.d/priorities.conf enabled = 1 # cat /etc/yum.repos.d/CentOS-Base.repo | grep "priority\|^\[" [base] priority=1 [updates] priority=1 ... # yum clean all # yum list | grep "tcp_wrappers\|nfs-utils" nfs-utils.x86_64 1:1.0.9-47.el5_5 installed nfs-utils-lib.x86_64 1.0.8-7.6.el5 installed tcp_wrappers.i386 7.6-40.7.el5 installed tcp_wrappers.x86_64 7.6-40.7.el5 installed nfs-utils-lib.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.x86_64 1.0.8-7.6.el5 base tcp_wrappers-devel.x86_64 7.6-57.el5.rfx rpmforge-extras tcp_wrappers-libs.x86_64 7.6-57.el5.rfx rpmforge-extras # yum update ... 132 packages excluded due to repository priority protections Setting up Update Process Resolving Dependencies --> Running transaction check --> Processing Dependency: tcp_wrappers for package: nfs-utils --> Processing Dependency: tcp_wrappers for package: nfs-utils ---> Package tcp_wrappers-devel.x86_64 0:7.6-57.el5.rfx set to be updated ---> Package tcp_wrappers-libs.x86_64 0:7.6-57.el5.rfx set to be updated --> Finished Dependency Resolution 1:nfs-utils-1.0.9-47.el5_5.x86_64 from installed has depsolving problems --> Missing Dependency: tcp_wrappers is needed by package 1:nfs-utils-1.0.9-47.el5_5.x86_64 (installed) Error: Missing Dependency: tcp_wrappers is needed by package 1:nfs-utils-1.0.9-47.el5_5.x86_64 (installed) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest I removed tcp_wrappers.i386 # yum list | grep "tcp_wrappers\|nfs-utils" nfs-utils.x86_64 1:1.0.9-47.el5_5 installed nfs-utils-lib.x86_64 1.0.8-7.6.el5 installed tcp_wrappers.x86_64 7.6-40.7.el5 installed nfs-utils-lib.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.i386 1.0.8-7.6.el5 base nfs-utils-lib-devel.x86_64 1.0.8-7.6.el5 base tcp_wrappers.i386 7.6-40.7.el5 base tcp_wrappers-devel.x86_64 7.6-57.el5.rfx rpmforge-extras tcp_wrappers-libs.x86_64 7.6-57.el5.rfx rpmforge-extras # yum update ... 132 packages excluded due to repository priority protections Setting up Update Process Resolving Dependencies --> Running transaction check --> Processing Dependency: tcp_wrappers for package: nfs-utils ---> Package tcp_wrappers-devel.x86_64 0:7.6-57.el5.rfx set to be updated ---> Package tcp_wrappers-libs.x86_64 0:7.6-57.el5.rfx set to be updated --> Running transaction check ---> Package tcp_wrappers.i386 0:7.6-40.7.el5 set to be updated --> Finished Dependency Resolution Dependencies Resolved ==================================================================================================== Package Arch Version Repository Size ==================================================================================================== Installing: tcp_wrappers-devel x86_64 7.6-57.el5.rfx rpmforge-extras 8.7 k replacing tcp_wrappers.x86_64 7.6-40.7.el5 tcp_wrappers-libs x86_64 7.6-57.el5.rfx rpmforge-extras 88 k replacing tcp_wrappers.x86_64 7.6-40.7.el5 Installing for dependencies: tcp_wrappers i386 7.6-40.7.el5 base 109 k nfs-utils insists on reinstalling tcp_wrappers.i386, and priorities apparently does not protect the CentOS packages... If I disable rpmforge, I get "No Packages marked for Update", but still have "7 packages excluded due to repository priority protections" If I also disable priorities, I just get "No Packages marked for Update" # ll /etc/yum.repos.d/ total 28 -rw-r--r-- 1 root root 2412 Jan 27 14:38 CentOS-Base.repo -rw-r--r-- 1 root root 626 Apr 26 2010 CentOS-Media.repo -rw-r--r-- 1 root root 739 Nov 13 04:55 mirrors-rpmforge -rw-r--r-- 1 root root 717 Nov 13 04:55 mirrors-rpmforge-extras -rw-r--r-- 1 root root 728 Nov 13 04:55 mirrors-rpmforge-testing -rw-r--r-- 1 root root 1113 Feb 2 17:15 rpmforge.repo Any idea what is going on or how I can clean up this mess...? Do you have to block all i386 packages? Thx, JD

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Directions please..
by Hal Davison 04 Feb '11

04 Feb '11

Greetings... OS: CentOS 5.5 Attempting to run a database, PROGRESS, give the error: error wile loading shared libraries: libstdc++libc6.2.2.so.3: cannot open shared object file: No such file or directory I am relatively a noob at CentOS. So you kind assistance in pointing me in the correct direction would be appreciated. --Hal. -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

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Recovering LVM volumes
by Sanjay Arora 04 Feb '11

04 Feb '11

Hello all I have two sets of eIDE hard drives from earlier servers, one centos & one fedora. Both were LVM volumes with three or four physical disks, with ext3 fs. One disk, maybe even the boot one may even be missing, either from one or both sets and we do not know the disk order. I got these left from an earlier sysadmin who left the company & nobody know what's what. I need to recover data so I need to backup each of the disks to a disk image file first, then find block-size/recover lvm metadata on the volume, mount the volume to my current server and recover whatever files can be recovered manually. My question is: - what switches to be used with dd in creating the image, so that I retain the lvm disk data, for future recovery, if I mess up the recovery job? Can you please give the actual command assuming disk is connected at /dev/sdb? - How do I find the blocksize used by the disk & how do I get the meta-data and mount the disk to current lvm fs. Request please give me step by step process. I am finding the howtos & examples on the net very daunting as most of them have co-issues of raid etc. Mine is a plain lvm spanning multiple disks. I don't have expertise of this level & suddenly my boss is expecting me to perform a miracle. Please help. With best regards. Sanjay.

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Does anybody know a PeerGuardian like app?
by S Mathias 04 Feb '11

04 Feb '11

Are there any programs blocking ip, and has frequently updated lists, like the peerguardian on windows? sorry for the question, but i looking for this kind of application :O Thank you, and a happy christmas!

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LSI MegaRAID 320-2E PCIe RAID Controller
by Hugh E Cruickshank 04 Feb '11

04 Feb '11

Hi All: Has anyone tried using an LSI MegaRAID 320-2E PCIe RAID Controller in an HP DL380G5 (of any HP G5 DL for that matter) running CentOS 5? It looks like it should work but it would be nice to know that someone has already done it before I start going to all the effort and expense of building the box. I have a spare DL380 and a couple of IBM EXP400 disk arrays that I would like to configure as a backup database server. Any and all comments will be appreciated. Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com

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filter unwanted email
by testwreq wreq 04 Feb '11

04 Feb '11

I am new to CentOS. How do I set a rule to so that any email coming from @ linkedin.com (and other abused locations), going to an application RT (setup on the system), will get rejected or dropped silently.

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Lost root access
by James Bensley 04 Feb '11

04 Feb '11

So on a virtual server the root password was no longer working (as in I couldn't ssh in anymore). Only I and one other know it and neither of us have changed it. No other account had the correct privileges to correct this so I'm wondering, if I had mounted that vdi as a secondary device on another VM, browsed the file system and delete /etc/shadow would this have wiped all users passwords meaning I could regain access again? (This is past tense because its sorted now but I'm curious if this would have worked? And if not, what could I have done?). -- Regards, James. http://www.jamesbensley.co.cc/ There are 10 kinds of people in the world; Those who understand Vigesimal, and J others...?

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CentOS 4.8
by Y. K. Liu 03 Feb '11

03 Feb '11

Hi, I installed CentOS 4.8 (not CentOS 5) on VMware Fusion using an ISO file I downloaded. During the installation, it asked me to enter a user name and its password. I tried to enter root for the user name, but it would not let me do that. So I had to enter a non-root user name. So I did not have the root user name and password when the installation completed. I only had a non-privileged user name, and could not do any sudo work. How can I solve this problem? I noticed that CentOS 5 (not the 4.8 I needed to install) asking to enter the password for root during the installation. But I need to install CentOS 4.8, not 5. Thank you. Jerry

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centos 5.5 check memoray usage too high???
by mcclnx mcc 03 Feb '11

03 Feb '11

We have DELL R900 server with 128GB RAM (CENTOS 5.5)in it. This server only have one application running and few people use it. Every week I ata least get one or two messages from monitor tool mail to me say: Message=Memory Utilization is 92.02%, crossed warning (80) or critical (90) threshold. Since server have 128 GB RAM and only 1 application. I really don't belive that. Does there has some way can check memory utilitation ? Thanks.

11 13

How to set GNOME-panel to several columns if needed?
by kellyremo 03 Feb '11

03 Feb '11

http://i.imgur.com/rUKeu.png how could i configure the GNOME-panel to have several columns [if there are many applications]? ~~like this: http://i.imgur.com/ElgAA.jpg Thank you!

2 1

Re: [CentOS] CentOS Digest, Vol 73, Issue 3
by Chuck Munro 03 Feb '11

03 Feb '11

On 02/03/2011 09:00 AM, Lamar Owen wrote: > ------------------------------ > > On Wednesday, February 02, 2011 08:04:43 pm Les Mikesell wrote: >> > I think there are ways that drives can fail that would make them not be detected >> > at all - and for an autodetected raid member in a system that has been rebooted, >> > not leave much evidence of where it was when it worked. If your slots are all >> > full you may still be able to figure it out but it might be a good idea to save >> > a copy of the listing when you know everything is working. > I'll echo this advice. > > I guess I'm spoiled to my EMC arrays, which light a yellow LED on the DAE and on the individual drive, as well as telling you which backend bus, which enclosure, and which drive in that enclosure. And the EMC-custom firmware is paranoid about errors. > > But my personal box is a used SuperMicro dual Xeon I got at the depth of the recession in December 2009, and paid a song and half a dance for it. It had the six bay hotswap SCSI, and I replaced it with the six bay hotswap SATA, put in a used (and cheap) 3Ware 9500S controller, and have a RAID5 of four 250GB drives for the boot and root volumes, and an MD RAID1 pair of 750GB drives for /home. The Supermicro motherboard didn't have SATA ports, but I got a 64-bit PCI-X dual internal SATA/dual eSATA low-profile board with the low-profile bracket to fit the 2U case. Total cost<$500. > Less than $500 for a Supermicro box? Holy crap, Batman! I'm using one of their motherboards (X8DAL-3) in a home-brew configuration, which has turned out to be somewhat less expensive than a factory-built Supermicro, but still not cheap. I'll say one thing for them ... they do make really nice stuff, with little extras the commodity makers like Asus or Gigabit don't include. Well worth the extra dollars. This box just screams, so it should handle KVM very nicely if I organize the arrays properly ... anyone with RAID-60 advice please chime in. I took Les' advice and built a connection map of the 15 drives. The Disk Utility GUI turned out to be useful once I determined the SATA breakout cable order and labelled each with its PHY number. Knowing that lets me use the GUI to clearly identify a failed drive, which shows up as a PHY#. I'm normally a command-line kinda guy but this utility is something I really like on RHEL-6. I hope it's the same on CentOS-6. I'll organize the disk arrays with this trial version of RHEL, on the assumption that CentOS-6 simply picks them up as-built. Chuck

6 7

No kernel-debuginfo for actual kernel?
by Gerhard Schneider 03 Feb '11

03 Feb '11

After a crash I tried wget http://debuginfo.centos.org/5/x86_64/kernel-debuginfo-2.6.18-194.32.1.el5.x… as usual. But for 32.1 there is no kernel-debuginfo. Is there any reason for that? Thank you in advance! Gerhard Schneider -- Gerhard Schneider e-Mail:gs@ilsb.tuwien.ac.at Institute of Lightweight Design and Tel.: +43 664 60 588 3171 Structural Biomechanics (E317) Fax.: +43 1 58801 31799 Vienna University of Technology / Austria DVR: 0005886 A-1040 Wien, Gusshausstrasse 27-29 http://www.ilsb.tuwien.ac.at/

2 2

hp laptop
by Jerry Geis 03 Feb '11

03 Feb '11

I have a new hp laptop, I installed centos 5.5 on x86_64. I was only seeing one core in /proc/cpuinfo. The CPU is core i5 M450 which should be dual core. So I put a more recent kernel on the machine, 2.6.34.7 did the compile and all - rebooted and I still only see one core in /proc/cpuinfo. the i5 M450 is a dual core cpu. Is there something else I am missing? Thanks, Jerry

2 1

OT: looking for system Rescue CD with LSI MegaRAID 8708EM2 drivers pre-installed
by Rudi Ahlers 03 Feb '11

03 Feb '11

Hi all, Does anyone know of a Linux rescue CD with driver for a SLI MegaRAID 8708? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

3 2

Re: [CentOS] RHEL-6 vs. CentOS-5.5 (was: Static assignment of SCSI device names?)
by Chuck Munro 03 Feb '11

03 Feb '11

On 02/02/2011 09:00 AM, Lamar Owen wrote: > > On Wednesday, February 02, 2011 02:06:15 am Chuck Munro wrote: >> > The real key is to carefully label each SATA cable and its associated >> > drive. Then the little mapping script can be used to identify the >> > faulty drive which mdadm reports by its device name. It just occurred >> > to me that whenever mdadm sends an email report, it can also run a >> > script which groks out the path info and puts it in the email message. >> > Problem solved:-) > Ok, perhaps I'm dense, but, if this is not a hot-swap bay you're talking about, wouldn't it be easier to have the drive's serial number (or other identifier found on the label) pulled into the e-mail, and compare with the label physically found on the drive, since you're going to have to open the case anyway? Using something like: > > hdparm -I $DEVICE | grep Serial.Number > > works here (the regexp Serial.Number matches the string "Serial Number" without requiring the double quotes....). Use whatever $DEVICE you need to use, as long as it's on a controller compatible with hdparm usage. > > I have seen cases with a different Linux distribution where the actual module load order was nondeterministic (modules loaded in parallel); while upstream and the CentOS rebuild try to make things more deterministic, wouldn't it be safer to get a really unique, externally visible identifier from the drive? If the drive has failed to the degree that it won't respond to the query, then query all the good drives in the array for their serial numbers, and use a process of elimination. This, IMO, is more robust than relying on the drive detect order to remain deterministic. > > If in a hotswap or coldswap bay, do some data access to the array, and see which LED's don't blink; that should correspond to the failed drive. If the bay has secondary LED's, you might be able to blink those, too. > > Well no, you're not being dense. It's a case of making the best of what the physical hardware can do for me. In my case, the drives are segregated into several 3-drive bays which are bolted into the case individually, so removing each one to compare serial numbers would be a major pain, since I'd have to unbolt a bay and remove each drive one at a time to read the label. The use of the new RHEL-6/CentOS-6 'udevadm' command nicely maps out the hardware path no matter the order the drives are detected/named, and since hardware paths are fixed, I just have to attach a little tag to each SATA cable with that path number on it. One thing I did was reboot the machine *many* times to make sure the controller cards were always enumerated by Linux in the same slot order. I also notice that the RHEL-6 DriveInfo GUI application shows which drive is giving trouble, but it only maps the controllers in a vague way with respect to the hardware path. (At least that's what I remember seeing a couple of days ago, I could be mistaken.) On this particular machine I don't have the luxury of per-drive LED activity indicators, so whacking each drive with a big read won't point the way (but I have used that technique on other machines). I didn't have the funds to buy the hot-swap bays I would have preferred. I may retrofit later. Your suggestions are well taken, but the hardware I have doesn't readily allow my use of them. Thanks for the ideas. Chuck

3 2

[OT] Best way to get dhcpd messages piped to a web service.
by Jason Pyeron 03 Feb '11

03 Feb '11

Starting off, it is important not to loose any dhcp messages, especially during log rotation. My first thought on this would be to add a fifo to syslog.conf and slup from it, like: # perl -ne 'm/.../ && WWW::Curl ...' < /var/log/messages.fifo Does anyone see a more proper way? tail -F / -f could both miss messages during log rotation (please correct me if I am wrong) What are some of the problems that could be manifested in syslog if the fifo consumer stops consuming or has other issues? -Jason -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

2 1

Centos + python + sqlalchemy + mysql
by przemolicc＠poczta.fm 03 Feb '11

03 Feb '11

I am trying to use the following set (all from standard repositories): centos (5.5) + python 2.6 + sqlalchemy + mysql. However while running my script I get: Traceback (most recent call last): File "./oraping2.py", line 43, in <module> main() File "./oraping2.py", line 23, in main db = create_engine('mysql:///u1oraping@localhost:3306/oraping',echo=False,pool_recycle=1800) File "/usr/lib/python2.6/site-packages/sqlalchemy/engine/__init__.py", line 244, in create_engine return strategy.create(*args, **kwargs) File "/usr/lib/python2.6/site-packages/sqlalchemy/engine/strategies.py", line 60, in create dbapi = dialect_cls.dbapi(**dbapi_args) File "/usr/lib/python2.6/site-packages/sqlalchemy/dialects/mysql/mysqldb.py", line 101, in dbapi return __import__('MySQLdb') File "/usr/lib64/python2.4/site-packages/MySQLdb/__init__.py", line 19, in <module> import _mysql ImportError: /usr/lib64/python2.4/site-packages/_mysql.so: undefined symbol: Py_InitModule4 Did anybody faced this error ? Does anybody use the above set of software on Centos ? Regards Przemek ----------------------------------------------------------------- Sprawdz pogode. Kliknij >>> http://linkint.pl/f2903

3 2

~/.forward file?
by Smithies, Russell 03 Feb '11

03 Feb '11

Hi all, I'm just poking thru our previous sysadmin's user adding script and saw reference to a ~/.forward file containing the users email address. Any idea what it might be for? It's a tricky one to Google ;-) Thanx, Russell Smithies ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================

6 5

kernel errors
by Michel Donais 03 Feb '11

03 Feb '11

For monday this week I began to receive these advice by email from the server; Wht's the meaning? Disk read problem or else? --------------------- Kernel Begin ------------------------ WARNING: Kernel Errors Present I/O error: dev 08:02, sect...: 4Time(s) Additional sense indicates Unrecovered read error...: 4Time(s) Info fld=0x4f9c9, Current sd08:02: sense key Medium Error...: 1Time(s) Info fld=0x50e37, Current sd08:02: sense key Medium Error...: 1Time(s) Info fld=0x517a1, Current sd08:02: sense key Medium Error...: 1Time(s) Info fld=0x517e2, Current sd08:02: sense key Medium Error...: 1Time(s) ------------------------------------------------------------------------------------------ --- Michel Donais

2 2

Re: [CentOS] how to move forward/undo/revert/fix re: a failed CentOS 5.5 to SL 5.5 migration ... [SOLVED?]
by Larry Vaden 02 Feb '11

02 Feb '11

On Wed, Jan 26, 2011 at 11:25 AM, Larry Vaden <vaden(a)texoma.net> wrote: > For various reasons which seemingly fail the necessary/sufficient > tests with the benefit of hindsight, I attempted to migrate a shell > machine which is the beach front from which I work (not a production > server) from CentOS 5.5 to Scientific Linux 5.5 yesterday. > > Karanbir is quoted on this list as having said something like: > > "All that you should need to do is install centos-release, remove > redhat-release rpms and just yum update the machine, which should > bring in all packages changed by CentOS ( since they will have a > slightly higher E-V-R )." > > In other words, is there a get out of jail card based on Karanbir's > stanza which will return the machine to a consistent state without a > fresh install? With apologies for replying to my own post, the final solution (possibly regarded as draconian and puerile by others) which seemed to work to return to a consistent state was to download Oracle R5U6 and invoke 'rpm -ivh' following some rpm which must be set aside in order to avoid "can not coexist." (e.g., bind vs. bind97 et al). My thoughts are that it would work as well once CentOS and Scientific Linux R5U6 are released. It was necessary to pay special attention to the output of updatedb; locate .rpm | egrep ".rpmnew$|.rpmorig$|.rpmsave$" No data was lost, but I watch some Dennis Miller, and like him at the end of a rant, "I could be wrong about that" :) kind regards/ldv

4 6

what pkg contains libstdc++-libc6.2-2.so.3
by Fong Vang 02 Feb '11

02 Feb '11

In CentOS 4.1/2, what package contains this library: libstdc++-libc6.2-2.so.3? I installed a couple of the compat- packages, but this library is still missing.

8 8

Squid and SELinux
by Marcos Lois Bermúdez 02 Feb '11

02 Feb '11

Hi. I'm trying to setup squid with SELinux, the problem i encounter is taht i want to add another directory for cache, in this system we have a home partition with huge space, i create a squid dir and add the path with semanage: semanage fcontext -a -t squid_cache_t '/home/squid(/.*)?' i check the files and are in the good context: drwxr-xr-x squid squid user_u:object_r:squid_cache_t . drwxr-xr-x squid squid system_u:object_r:home_root_t .. drwxr-x--- squid squid user_u:object_r:squid_cache_t 00 drwxr-x--- squid squid user_u:object_r:squid_cache_t 01 ... But when i want start it i get this: type=AVC msg=audit(1296442326.932:739661): avc: denied { search } for pid=30924 comm="squid" name="/" dev=sda3 ino=2 scontext=user_u:system_r:squid_t:s0 tcontext=system_u:object_r:home_root_t:s0 tclass=dir I know that the solution is to mount the huge partition on /var/spool/squid, i'm a newbie to SELinux, and want to know if it's posible to archive this. Regards.

3 4

glibc++6.2?
by Hal Davison 02 Feb '11

02 Feb '11

Greetings ALL... V 5.5 Gnome. Desktop Looking for glibc++6.2 and higher. --Hal -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

7 8

Re: [CentOS] CentOS 6.0 new virtualization features?
by Matt 02 Feb '11

02 Feb '11

>> I am excited about CentOS 6.x though. Aren't there supposed to be >> some neat new features etc for virtualization and cloud computing? > > this could be the start of a dangerously long thread nonrelated to OP. > Why not start a new thread with 'CentOS-6 interesting upcoming features' :) Your right.

5 4

Re: [CentOS] RHEL-6 vs. CentOS-5.5 (was: Static assignment of, SCSI device names?)
by Chuck Munro 02 Feb '11

02 Feb '11

Les Mikesell wrote: > > On 1/30/11 1:37 PM, Chuck Munro wrote: >> > Hello list members, >> > >> > My adventure into udev rules has taken an interesting turn. I did >> > discover a stupid error in the way I was attempting to assign static >> > disk device names on CentOS-5.5, so that's out of the way. >> > >> > But in the process of exploring, I installed a trial copy of RHEL-6 on >> > the new machine to see if anything had changed (since I intend this box >> > to run CentOS-6 anyway). >> > >> > Lots of differences, and it's obvious that RedHat does things a bit >> > differently here and there. My focus has been on figuring out how best >> > to solve my udev challenge, and I found that tools like 'scsi_id' and >> > udev admin/test commands have changed. The udev rules themselves seem >> > to be the same. > Do any of the names under /dev/disk/* work for your static identifiers? You > should be able to use them directly instead of using udev to map them to > something else, making it more obvious what you are doing. And are these names > the same under RHEL6? > I was happy to see that device names (at least for SCSI disks) have not changed. The more I look into the whole problem the more I realize that I've overstated the difficulty, now that I know how to map out the hardware path for any given /dev/sdX I might need to replace. I've never dug as deeply into this before, mostly because I never could find the spare time. I'm happy with simply writing a little script which accepts a /dev/sdX device name argument and reformats the output of: 'udevadm info --query=path --name=/dev/sdX' to extract the hardware path. It's a bit cleaner than the current RHEL-5/CentOS-5 'udevinfo' command. Using the numeric path assumes knowledge of how the motherboard sockets are laid out and the order in which I/O controller channels are discovered, of course. It's then not difficult to trace a failed drive by attaching little tags to the SATA cables from the controller cards. The real key is to carefully label each SATA cable and its associated drive. Then the little mapping script can be used to identify the faulty drive which mdadm reports by its device name. It just occurred to me that whenever mdadm sends an email report, it can also run a script which groks out the path info and puts it in the email message. Problem solved :-) So even though I figured out how to add 'alias' symlink names to each disk drive, I'm not going to bother with it. It was a very useful learning experience, though. Chuck

2 1

Setting up persistent LUNs
by Dvorkin, Asya 02 Feb '11

02 Feb '11

Hello everyone, I am trying to setup persistent LUNs and having problems. I've been following instructions I found on the web and they refer to editing /etc/scsi_id.config file and adding options=-g line there. After doing so, I should be able to run scsi_id -g -s /dev/sd* and get proper results. I've modified file /etc/scsi_id.config appropriately: [root@psrwjmsafs1 etc]# grep options /etc/scsi_id.config vendor="ATA",options=-p 0x80 options=-g but whenever I run scsi_id -g -s /b/sde1 - i get nothing. [root@psrwjmsafs1 etc]# df -k |grep sde /dev/sde1 1754602560 93383616 1572090328 6% /test How come? Am i missing something? Thank you! Asya

2 2

limiting yum url question
by Xinhuan Zheng 02 Feb '11

02 Feb '11

Hi, I need to configure yum to limit the number of URLs going out for security reason. I don't find a configuration for include option. I do find an exclude option in /etc/yum/pluginconf.d/fastestmirror.conf. It would be impossible to exclude every url in this file. What is the best way to limit the traffic going out interest for yum? Is the local network repository a better way or does there exist an include option that I am not aware of? Thanks, --xinhuan

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