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How to find out values from dhcp query
by Robert Moskowitz 12 Mar '09

12 Mar '09

How can I find out what variables and their values were provided by a dhcpd server to my client? I thought perhaps /etc/dhclient-eth1.conf, but that is not the place...

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port based routing
by Marcus Moeller 12 Mar '09

12 Mar '09

Good Evening, I am trying to set up port based routing on a CentOS 5.2 box as described here: http://www.linuxhorizon.ro/iproute2.html (second example) Therefor I have set up the following mangle and routing rules: $IPTABLES -A OUTPUT -t mangle -p tcp --dport 1100 -j MARK --set-mark 1 $IPTABLES -A OUTPUT -t mangle -p tcp --dport 1101 -j MARK --set-mark 2 $IPTABLES -A OUTPUT -t mangle -p tcp --dport 1102 -j MARK --set-mark 3 $IP route add default dev ppp100 table SOESTCOM1 $IP route add default dev ppp101 table VERSATEL1 $IP route add default dev ppp102 table TONLINE1 $IP rule add from all fwmark 1 table SOESTCOM1 $IP rule add from all fwmark 2 table VERSATEL1 $IP rule add from all fwmark 3 table TONLINE1 iptables -t mangle -L -vn output: http://pastebin.centos.org/24626 shows that the packages are marked correctly. Here is an example ip route show table output: default dev ppp102 scope link But it seems (and tcpdump indicates) that packages are still routed via default route, instead. Do I need to set some proc flags to activate port based routing? Best Regards Marcus

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howto prevent gnome_panel from starting up one 5.2 x86_64
by Jerry Geis 12 Mar '09

12 Mar '09

how do I prevent gnome_panel from starting up? once its started I can do "gnome-session-remove gnome_panel" But I dont want it to startup at all. How can I do that? jerry

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Re: [CentOS] Getting "poll: protocol failure in circuit setup" from rsh - solved
by Sorin Srbu 12 Mar '09

12 Mar '09

>-----Original Message----- >From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf >Of Sorin Srbu >Sent: Friday, February 20, 2009 11:36 AM >To: 'CentOS mailing list' >Subject: [CentOS] Getting "poll: protocol failure in circuit setup" from rsh > > I inherited a cpu-stats script from the previous *nixadmin at our > department. This script relies on a rsh-command to get the vmstats from the > remote machines and then using a perl script to push it to a web server. > >Now I've just added a new machine running CentOS 5.2 x64 to the script and I >get the error message in the subject line; "poll: protocol failure in >circuit setup". Replying on my own post for archival reasons: The error was in /etc/hosts.allow. I forgot to add a line "in.rshd: FQDN" in hosts.allow on the machine I imaged and then used to install to a bunch of other machines. Easy to miss though, there are a dozen or so other lines in there allowing other daemons and stuff. Fixing that, now "rsh remote-machine vmstat" works as expected. -- /Sorin

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Disk usage for small files in ext3 in CentOS 5
by Filipe Brandenburger 12 Mar '09

12 Mar '09

Hello, I noticed something unusual today. If I "du" a small file (couple of bytes) in CentOS 5, it tells me the file is using 8kb, while I was expecting 4kb which is the block size I'm using. I tried this on several CentOS 5 machines, both x86_64 and i386: $ echo test >test.txt $ ls -l test.txt -rw-rw-r-- 1 filbranden filbranden 5 Mar 11 17:24 test.txt $ du -h test.txt 8.0K test.txt If I do the same on a CentOS 4 machine: $ echo test >test.txt $ ls -l test.txt -rw-rw-r-- 1 filbranden filbranden 5 Mar 11 17:25 test.txt $ du -h test.txt 4.0K test.txt On all machines I tested, both CentOS 4 and CentOS 5: # tune2fs -l /dev/xxxxx ... Block size: 4096 Fragment size: 4096 I could not find any differences that would explain the behaviour. Have you seen this before? Can you reproduce it on your systems? Do you know how to get the CentOS 4 behaviour? More on the point: I'm migrating some data from CentOS 4 to CentOS 5, it's around 70GB of millions of small files. I would like it to still take 70GB, not 140GB. For now, I'm working around this issue by using "-T small" to mke2fs, I'm not sure if it's going to have the effect I want, and I'm not sure about any other impact (performance?) it might have on my filesystem. Thanks, Filipe

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Intermittent NFS problems with NetApp server
by Alfred von Campe 11 Mar '09

11 Mar '09

I've been experiencing some intermittent problems accessing at NetApp server via NFS and automount. I'm running CentOS 5.2 (fully updated) on all my servers and workstations. Usually, everything is working just fine, when suddenly we get the following error: /bin/sh: /home/epd/srcref/swtools/Crontabs/ run_release_requests.sh: Permission denied This is actually an email from cron because we try to run that shell script every minute (yes, the crontab entry is * * * * * /home/epd/ srcref/swtools/Crontabs/run_release_requests.sh), and /home/epd is an automounted directory. Here is its map entry: epd -rw,nointr,rsize=32768,wsize=32768 XXXXXX:/epd When this is happening, other users can successfully access that directory on the server. The directory is actually mounted correctly, and unmounting doesn't fix the issue. Furthermore, the same user that is being denied access, can successfully access that directory on a different server. The problem usually lasts about 20 minutes and then resolves itself. We have been pulling our hair out trying to debug this problem, because it's intermittent and the debug window is fairly short. Recently we have been getting help from one of the NetApp admins, and he ran a command on the NetApp that produced the following warning: The TCP receive window advertised by NFS client XXXXXXX is 5888. This is less than the recommended value of 32768 bytes. You should increase the TCP receive buffer size for NFS on the client. Some googling around got me to check these values for TCP: # sysctl net.ipv4.tcp_mem net.ipv4.tcp_mem = 98304 131072 196608 # sysctl net.ipv4.tcp_rmem net.ipv4.tcp_rmem = 4096 87380 4194304 # sysctl net.ipv4.tcp_wmem net.ipv4.tcp_wmem = 4096 16384 4194304 So these seem fine to me (i.e., the max is greater than 32768). Is there an NFS (as opposed to TCP) setting I should be tweaking? Any ideas why the NetApp is issuing those warnings? Any other suggestions on how to debug this problem? Thanks, Alfred

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Video Editing
by Bo Lynch 11 Mar '09

11 Mar '09

This is kind of a new area for me so I thought I would get the lists opinion. I have a avi video that I need to edit. The main thing that I need to accomplish is to maybe cut the top 1/3 of the frame and blur out a few faces. What would you guys recommend for an app that would accomplish this? Thanks in advance for any info. -- Bo Lynch

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LSI Logic MegaRAID 8480 Storage controller policies?
by drew einhorn 11 Mar '09

11 Mar '09

Life is much better now that I'm using -h instead of the manual. I have a new question about policies Direct and DisDskCache makes sense Cached and EnDiskCache makes sense not so sure about Direct and EnDskCache Cached and DisDsk Cache Do they make sense? -- Drew Einhorn

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CentOS-announce Digest, Vol 49, Issue 5
by centos-announce-request＠centos.org 11 Mar '09

11 Mar '09

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. Services outage for : projects.centos.org (Karanbir Singh) 2. CESA-2009:0333-01: Moderate CentOS 2 i386 libpng security update (John Newbigin) 3. CESA-2009:0325-01: Critical CentOS 2 i386 seamonkey security update (John Newbigin) ---------------------------------------------------------------------- Message: 1 Date: Tue, 10 Mar 2009 20:35:43 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] Services outage for : projects.centos.org To: centos-announce(a)centos.org Message-ID: <49B6CF1F.1090704(a)centos.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Starting at 2300 UTC Mar 11 2009, there will be 2 (two) hours of outage for all services hosted on projects.centos.org The machines that host these services are being moved to another cabinet within the same hosting facility. If there are any questions you might have, drop into #centos-devel and someone from the CentOS infrastructure team will be around to talk with during this outage and a few hours leading upto the outage. -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Wed, 11 Mar 2009 14:53:56 +1100 From: John Newbigin <jnewbigin(a)ict.swin.edu.au> Subject: [CentOS-announce] CESA-2009:0333-01: Moderate CentOS 2 i386 libpng security update To: centos-announce(a)centos.org Message-ID: <49B735D4.7070607(a)ict.swin.edu.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed The following errata for CentOS-2 have been built and uploaded to the centos mirror: RHSA-2009:0333-01 Moderate: libpng security update Files available: libpng-1.0.14-12.i386.rpm libpng-devel-1.0.14-12.i386.rpm More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html The easy way to make sure you are up to date with all the latest patches is to run: # yum update -- John Newbigin ITS Senior Analyst / Programmer Faculty of Information and Communication Technologies Swinburne University of Technology Melbourne, Australia http://www.ict.swin.edu.au/staff/jnewbigin ------------------------------ Message: 3 Date: Wed, 11 Mar 2009 14:59:33 +1100 From: John Newbigin <jnewbigin(a)ict.swin.edu.au> Subject: [CentOS-announce] CESA-2009:0325-01: Critical CentOS 2 i386 seamonkey security update To: centos-announce(a)centos.org Message-ID: <49B73725.5050506(a)ict.swin.edu.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed The following errata for CentOS-2 have been built and uploaded to the centos mirror: RHSA-2009:0325-01 Critical: seamonkey security update Files available: seamonkey-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-chat-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-devel-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-dom-inspector-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-js-debugger-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-mail-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-nspr-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-nspr-devel-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-nss-1.0.9-0.30.el2.c2.1.i386.rpm seamonkey-nss-devel-1.0.9-0.30.el2.c2.1.i386.rpm More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html The easy way to make sure you are up to date with all the latest patches is to run: # yum update -- John Newbigin ITS Senior Analyst / Programmer Faculty of Information and Communication Technologies Swinburne University of Technology Melbourne, Australia http://www.ict.swin.edu.au/staff/jnewbigin ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 49, Issue 5 **********************************************

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LSI Logic MegaRAID 8480 Storage controller
by drew einhorn 11 Mar '09

11 Mar '09

I have LSI Logic MegaRAID 8480 Storage controller I am having trouble reconfigure one of the hardware raid devices It is configured with 4 hardware raid logical volumes on /dev/sda /dev/sdb /dev/sdc /dev/sdd. I am in the middle of rebuilding the system, and at this point I am only using one of the volumes, /dev/sda /dev/sda, /dev/sdb, and /dev/sdd are all 2 drive raid1 mirrors I will be using the hardware raid logical volumes /dev/sdb and /dev/sdd with their current configurations I doubt that the hardware raid device on /dev/hda is causing any problems /dev/sda has two partitiions /dev/sda1 is a 100 MB ext3 partition mounted on /boot /dev/sda2 is a 20 GB lvm logical volume in a 67 GB volume group with an ext3 partition mounted on / the rest of the volume group is empty. I don't like the /dev/sdc is configued. It's configured as a 4 drive raid6. It will be used for database journal, nearly all sequential writes. I would rather use raid10 There are 3 ways to configure the hardware raid. The is something called WebBIOS which is sort of like a web browser that you access from the BIOS. This is ruled out since we will need to maintain the raid configuration with shutting down the operating system, or applications. There is a MegaCLI command line interface that runs under the operating system. Normally I prefer command line tools. But this software is big, and complex. All I have been able to find is a reference manual, that has lots of typos and is not very well organized for me to learn what I need to know. I have not been able to find a tutorial for this software. It will take more time than I have at the moment to figure out this tool. Finally there is the MegaRAID Storage Manager a GUI tool that runs under the OS. I'm running v2.77-00 So the first thing I need to do is delete the unwanted raid6 logical volume. When I try to delete it, it refuses and says: This is an OS drive. The virtual drive cannot be deleted. Any ideas on how to get past this problem with the MegaRAID Storage Manager, or pointers the better documentation, and maybe even a tutorial for the MegaCLI interface. -- Drew Einhorn

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