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Problems running programs compiled unter Centos 5 on Centos 4 machines
by Bernhard Gschaider 10 May '07

10 May '07

I know this is quite a handwaving, stupid question, but I don't know where else to ask it and maybe somebody here can at least point me into the right direction, because I'm stuck. I have a program package that were using here (OpenFOAM for those who know it). My problem is that when I compile and link this package on CentOS 5, it won't run on CentOS 4.x-machines but stops with a floating-point-exception. The funny thing is that my experiments with strace and gdb indicate that the problems occur during the loading of an .so (that does not belong to the package). I was able to remove that so from the build, the program then failed with similar symptoms at another library. Has anyone here seen similar behaviour and what would be a possible solution? (to compile under 5 in such a way that it runs on 4) My problem is, that moving all machines to CentOS 5 is not possible, because our cluster-solution (Rocks) is based on 4. Any hints (how trivial they may appear to you) are most welcome.

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Scripting question
by Frank M. Ramaekers 10 May '07

10 May '07

I'm writing a script that has logging via a simple routine: LogIt() { Msg="$1" echo "$THISSCRIPT: $Msg" echo "$Msg" >>$LogFile } #A portion of this script sends a file via ftp: # ftp -vn >$tempfile <<$$EOD : : $$EOD #Then reads the temporary file to log while read line do LogIt $line Done <$tempfile rm -f $tempfile -------------------------------------- All worked fine when I tested the ftp to a temporary file and reading it back to log the output, but once I created it as a cron entry (or so it seems) it now seems to take each line up to the first space: Connected 220-TCP/IP Copyright 220 Remote 331 230 250 200 local: 227 150-About : : See anything I'm doing wrong....any better way of handling this? TIA, Frank M. Ramaekers Jr. Systems Programmer; MCP, MCP+I, MCSE & RHCE American Income Life Insurance Company Phone: (254) 761-6649 Fax: (254) 741-5777

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RE: [CentOS] Disable window scaling during kickstart
by Plant, Dean 10 May '07

10 May '07

Ray Van Dolson wrote: > On Thu, May 10, 2007 at 06:34:54PM +0100, Plant, Dean wrote: >> Hello List, >> >> Due to a problem with CentOS 5 and one of our firewalls I am having >> to disable tcp window scaling to stop network connections grinding >> to a halt. I am also trying to Kickstart CentOS 5 machines through >> the firewall so need to disable window scaling at install time. >> >> I have added to the kickstart file >> >> %pre >> echo 0 > /proc/sys/net/ipv4/tcp_window_scaling >> >> But the install still hangs while transferring the stage2.img >> >> Should the above %pre work or do I need to do something else to >> disable window scaling during the install. >> >> In case anyone's interested CentOS 5 is the first time we have >> suffered this problem both CentOS 3&4 worked without issue. > > Weird issue. Haven't seen anyone else have it (at least on this > list). > > Can you switch over to your shell console when the hang happens and > examine the value of tcp_window_scaling to see if maybe it gets reset > somehow? I believe %pre should work.... > Weird... Tell me about it, I spent a lot of time head scratching trying to figure out why network connections would just mysteriously hang. Eventually found reference to a problem with tcp_window_scaling and firewalls and after disabling tcp_window_scaling on my test CentOS 5 box, everything started working. The install does not get far enough for the shell console to be available, it hangs at the transferring stage2.img. Dean

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Disable window scaling during kickstart
by Plant, Dean 10 May '07

10 May '07

Hello List, Due to a problem with CentOS 5 and one of our firewalls I am having to disable tcp window scaling to stop network connections grinding to a halt. I am also trying to Kickstart CentOS 5 machines through the firewall so need to disable window scaling at install time. I have added to the kickstart file %pre echo 0 > /proc/sys/net/ipv4/tcp_window_scaling But the install still hangs while transferring the stage2.img Should the above %pre work or do I need to do something else to disable window scaling during the install. In case anyone's interested CentOS 5 is the first time we have suffered this problem both CentOS 3&4 worked without issue. Thanks Dean

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Re: [CentOS] CentOS 5 and Broadcom wireless
by David G. Miller 10 May '07

10 May '07

"Bart Schaefer" <barton.schaefer(a)gmail.com> wrote: > SoftMAC: Scanning finished > > SoftMAC: Queueing Authentication Request to 00:aa:bb:cc:dd:ee > > SoftMAC: Cannot associate without being authenticated, requested authentication > > SoftMAC: Already requested authentication, waiting... > > SoftMAC: Sent Authentication Request to 00:aa:bb:cc:dd:ee. > > SoftMAC: Open Authentication with 00:aa:bb:cc:dd:ee failed, error code: 13 > > bcm43xx: Radio turned off That was as far as I got several months ago under FC6 when the native bcm43xx driver came out. There is (was?) a bugzilla for bcm43xx problems. I was able to get it to work only as long as I turned off authentication at my WAP. I recently tried bcm43xx with CentOS5 and the system froze during boot. This was with an x86_64 kernel. I went back to ndiswrapper which seems to work. I had an odd lockup/panic problem that was resolved with the 1.43 version of ndiswrapper. Cheers, Dave -- Politics, n. Strife of interests masquerading as a contest of principles. -- Ambrose Bierce

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Very, very lame question :(
by Mário Gamito 10 May '07

10 May '07

Hi, What is the package and the ctl name for fam in CentOS 4.4 ? Sorry... Warm Regards -- :wq! Mário Gamito

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CentOS-announce Digest, Vol 27, Issue 6
by centos-announce-request＠centos.org 10 May '07

10 May '07

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-2007:0349 Important CentOS 4 ia64 php - security update (Pasi Pirhonen) 2. CESA-2007:0349 Important CentOS 4 s390(x) php - security update (Pasi Pirhonen) ---------------------------------------------------------------------- Message: 1 Date: Wed, 9 May 2007 18:32:48 +0300 From: Pasi Pirhonen <upi(a)centos.fi> Subject: [CentOS-announce] CESA-2007:0349 Important CentOS 4 ia64 php - security update To: centos-announce(a)centos.org Message-ID: <20070509153248.GJ26635(a)centos.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2007:0349 https://rhn.redhat.com/errata/RHSA-2007-0349.html The following updated files have been uploaded and are currently syncing to the mirrors: ia64: updates/ia64/RPMS/php-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-devel-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-domxml-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-gd-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-imap-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-ldap-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-mbstring-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-mysql-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-ncurses-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-odbc-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-pear-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-pgsql-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-snmp-4.3.9-3.22.5.ia64.rpm updates/ia64/RPMS/php-xmlrpc-4.3.9-3.22.5.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://pasi.pirhonen.eu/ Top-postings silently ignored

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LVM Resizing Problem
by Al Sparks 10 May '07

10 May '07

I'm new to lvm. I decided to decrease the space of a logical volume. So I did a: $ df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/mapper/VolGroup00-LogVol00 1953 251 1602 14% / /dev/sda2 494 21 448 5% /boot tmpfs 1014 0 1014 0% /dev/shm /dev/mapper/VolGroup00-LogVol05 48481 6685 39295 15% /home /dev/mapper/VolGroup00-LogVol03 961 18 894 2% /tmp /dev/mapper/VolGroup00-LogVol01 7781 2051 5329 28% /usr /dev/mapper/VolGroup00-LogVol02 5239 327 4642 7% /var $ sudo lvm lvreduce -L -1000M /dev/VolGroup00/LogVol05 Rounding up size to full physical extent 992.00 MB WARNING: Reducing active and open logical volume to 47.91 GB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce LogVol05? [y/n]: y Reducing logical volume LogVol05 to 47.91 GB Logical volume LogVol05 successfully resized $ df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/mapper/VolGroup00-LogVol00 1953 251 1602 14% / /dev/sda2 494 21 448 5% /boot tmpfs 1014 0 1014 0% /dev/shm /dev/mapper/VolGroup00-LogVol05 48481 6685 39295 15% /home /dev/mapper/VolGroup00-LogVol03 961 18 894 2% /tmp /dev/mapper/VolGroup00-LogVol01 7781 2051 5329 28% /usr /dev/mapper/VolGroup00-LogVol02 5239 327 4642 7% /var Note that "df" shows the same size available. This probably means that the 2 "systems" aren't talking to each other (or my lvm command failed). When I rebooted, things failed, going into "repair filesystem" mode. I tried fsck /dev/VolGroup00/LogVol05 but after awhile, it started giving block errors, specifically "Error reading block <block-number> (Invalid argument) while doing inode scan. Ignore error<y>? I held down the <Enter> key for awhile in hopes that I'd be able to get through the errors, but no joy. I finally cancelled the thing. I can rebuild the server, it's no big deal. In fact the logical volume that went bad isn't a big deal data wise, and I shouldn't need that data to bring up the server itself. I shouldn't need to mount it. So can I still save this? === Al

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CentOS 5.0: Xen vs OpenVZ
by Lorenzo 10 May '07

10 May '07

Hi all, I've just installed CentOS 5.0 on two brand new server, and it's time for me to migrate a few virtual machines from the old servers. The old servers are running CentOS 4.4 + OpenVZ; I'm quite happy with this setup: fast safe and simple (for my experience as of now :) ) Also is very easy to migrate one virtual machine to a server to another for maintenance/reboots. I've also managed to setup a nightly rsync for backups and it's very fast (two pass: first rsync with virtual machine up; shutdown virtual machine; second rsync; restart virtual machine... all in a matter of minutes for a complete backup even on the biggest virtual machine with 12G of used disk space) Now the dilemma: should I stay with OpenVZ or should I jump to Xen? What I don't like of OpenVZ is the non-stock kernel; instead I like the easiness of management. What I don't like of Xen is the slow restart and the disk management (either dedicated partition or image file) which can lead to slower backup and harder migration; instead I'm attracted by the standard and fully supported kernel. Does anyone have experience on Xen and have advice on which could be the best compromise between the two solutions? Of course with Xen I have to start all over on learning but... hey I'm a Linux fan, I like to learn! Many thanks and have a good day Lorenzo Quatrini

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Suggestions for partition
by Alfred von Campe 10 May '07

10 May '07

The recent thread on Anaconda and RAID10 made me start to think about how to partition a server I'm about to set up. I have two 146GB SCSI drives on an IBM x3550. It will be used as a build system. As such, there is no critical data on these systems, as the source code will be checked out of our source control system, and the build results are copied to another system. I usually build my systems with Kickstart, so if a disk dies, I can rebuild it quickly. Given all that, how would you partition these disks? I keep going back and forth between various options (HW RAID, SW RAID, LVM, etc.). I guess speed is more important to me than redundancy. I'm tempted to install the OS on one drive and use the entire second drive for data. This way I can rebuild or upgrade the OS without touching the data. But that will waste a lot of disk space, as the OS does not need 146GB. The only thing I'm pretty sure of is to put 2GB of swap on each drive, but after that everything is still in the air. I am looking for any and all suggestions from the collective wisdom and experience of this list. Thanks, Alfred

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