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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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CentOS 5.2 i m having problem with gnome
by Tariq Ismail Dalvi 11 Mar '09

11 Mar '09

Hello to all, I am having a web server mail server Mysql and name server on single machine my os is CentOs 5.2 and desktop gnome everything was working fine now couple of days back I was using text editor, Fire Fox and GIMP at a time and my mouse started to act funny as well as very slow even my keyboard curser moves very slow I feel it is some sort of memory problem but I have noticed the servers are accessible from outside of network are fine except that I am only facing problem while using desk top. Secondly if I reboot the system it start to work fine for few hours. I shall highly appreciate if someone can give me a hint or how to fix it. Thank you.

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Spacewalk client centos 4
by Per Qvindesland 10 Mar '09

10 Mar '09

Hi List Does anyone have any good way to configure centos 4 machines for Spacewalk? Kind regards Per Qvindesland

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IPv6 under Centos?
by Timothy Murphy 10 Mar '09

10 Mar '09

I wonder if anyone is running IPv6 under Centos-5.2? Particularly with shorewall? I see that shorewall6 is specifically designed for updating shorewall to IPv6, as described in <http://www.shorewall.net/IPv6Support.html>. Unfortunately, this explicity requires kernel 2.6.25 or later, and iptables 1.4.0 or later, both of which are later than any versions I've seen on a Centos repository. I'm wondering how safe it would be to install Fedora versions of the required kernel and iptables? Or is there any alternative to shorewall that is IPv6 compatible? I don't really want to run iptables directly, unless forced to do so, as I have found shorewall very reliable and simple to configure. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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rm user:group
by Matt 10 Mar '09

10 Mar '09

I want to remove files but only if they are owned by a certain user and group. Basically I have this: find /var/spool/greylist -mmin +363 -exec rm -f {} \; I want to make sure it only deletes files owned by mail. Basically no matter what weird characters are in the file names I want to make sure it does not delete anything outside of /var/spool/greylist. I can add 'sudo -u' to it but then my secure log gets filled with entries but perhaps thats the only way to do it. Matt

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Re: [CentOS] Clonezilla SE with CentOS5
by Toby Bluhm 10 Mar '09

10 Mar '09

Sorin Srbu wrote: > Hi all, > > I'm looking for a cloning solution for our Windows/Linux/*nix computer park > and ran into Clonezilla. Apparantely the DRBL and other documentation > mentions CentOS as a suitable base for it. > > Does anybody on this list use this solution and can say something about it > in the running-Clonezilla-with-CentOS-context, be it recommendations, > gotchas', warnings or whatever? > Works nicely for my only purpose - Windows backup. Installs like an appliance - it will stomp on several config files without warning. Best to try it out on a test box or virtual machine. Had to sort through many small scripts to get it to do what I wanted. Main ones I edited were /opt/drbl/sbin/ocs-functions, /opt/drbl/lang/bash/en_US, /tftpboot/nbi_img/pxelinux.cfg/default. Use only one network, shut off nis master, made it a secondary dhcpd server, NFS mount the image storage point off another box. The logger service /opt/drbl/sbin/ocsmgrd didn't work the way I liked, so I use cobbled something together using nc. Because I changed around some files, I have to be careful with drbl/clonezilla updates. I found it useful to have spare disk/LVM space on the server to restore images to, easier restore of a single file or dir. Needs to be equal/larger than the biggest client disk. I had to move it from an x86_64 to i386 Centos - not all my client cpus could run 64bit. PXE boot other stuff like systemrescue, C5 install/rescue, DBAN, etc. I never posted anything, but Steven Shiau, the maintainer, seems responsive to questions on the mail list. -- tkb

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