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Migrating CentOS 5 -> 6: where to put /etc/inittab respawn scripts?
by Alexander Farber 07 Oct '11

07 Oct '11

Hello, sorry, for 1 more question on CentOS 5 -> CentOS 6 migration. On my old CentOS 5.7 machine I have the following line: pref:3:respawn:/bin/su -c '/usr/local/pref/pref.pl >/tmp/pref-`date +%a`.txt 2>&1' afarber and this has served me well, I don't want to install anything else like daemontools etc. - to keep my web-server easily reinstallable (or movable to another hoster). But now I have migrated to CentOS 6.0, added that line and the "init q", but nothing happens - as indeed promised by the comments in the new /etc/inittab. Where should I move my line, which docs to read? The pref.pl is a poll()ing TCP-sockets daemon for a game Thank you Alex

9 15

Re: [CentOS] guest vms crash host systems -- SOLVED
by Negative 07 Oct '11

07 Oct '11

On Wed, Oct 5, 2011 at 10:27 PM, Negative <negativebinomial(a)gmail.com>wrote: > On Wed, Oct 5, 2011 at 3:11 PM, Negative <negativebinomial(a)gmail.com>wrote: > >> On Wed, Oct 5, 2011 at 3:06 PM, Negative <negativebinomial(a)gmail.com>wrote: >> >>> On Wed, Oct 5, 2011 at 1:00 PM, <m.roth(a)5-cent.us> wrote: >>> >>>> Negative wrote: >>>> > On Wed, Oct 5, 2011 at 11:15 AM, <m.roth(a)5-cent.us> wrote: >>>> > Negative wrote: >>>> > On Wed, Oct 5, 2011 at 11:15 AM, <m.roth(a)5-cent.us> wrote: >>>> >> Negative wrote: >>>> <snip> >>>> >> > I still wonder what is causing this. I couldn't find any mention of >>>> a >>>> >> > similar problem, including on my desktop in my office, where I have >>>> a >>>> >> > very similar setup, with four kvm guests, two Fedora, one Centos 6 >>>> and >>>> >> > one Windows XP. >>>> <snip> >>>> Do I remember this is 5.7? Look at the announcement that *just* came out >>>> in the last hour, with the libX11 bugfix. >>>> <https://rhn.redhat.com/errata/RHBA-2011-1351.html> says "Previously, >>>> in >>>> the 64-bit mode, libX11 computed addresses using the 32-bit arithmetic. >>>> As >>>> a consequence, under heavy load, applications running in the X >>>> environment >>>> terminated unexpectedly. A patch has been provided to address this >>>> issue, >>>> and the crashes no longer occur in the described scenario." >>>> >>>> mark >>>> >>>> >> And, Mark, thanks for mentioning it. >> >> >>> >>> If this isn't my lucky day. RH and Centos solved my problem even before I >>> defined it. >>> >>> I saw the update earlier and didn't dare hope. I updated and it seems to >>> have solved the issue. On the host machine, I fired up virt-manager, started >>> the Fedora guest and it's been up for a half hour. >>> >>> Now I, too, can start complaining about Gnome 3. I've read it's like >>> Windows, but it's the spitting image of the Mac OS. >>> >>> >>> >> > > I spoke too soon. Crashed again after being up for several hours. I'm > running memtest86 now. > > After memtest found no errors, I gave another shot at looking for a software reason for the crashes and found the cause. I hadn't mention that I messed up the bridge setup. I didn't think that could lock up the host machine, but it did. Once I had the bridge fixed, the crashing stopped and network has been working on the guest. So it was my bad there. I thought that an incorrect network config would only affect networking, but it was causing a kernel panic.

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Kerberos auth
by Bazy 07 Oct '11

07 Oct '11

Hello, I'm thinking of implementing centralized authentication using Kerberos on 48 servers, all Linux. I have no Active Directory. Can you please point me out to where I should RTFM :-) maybe some of you have tips or tutorials for me. Cheers!

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CentOS 6 and Pyzor
by John Hinton 06 Oct '11

06 Oct '11

Had anybody been successful in getting Pyzor to run on CentOS 6 64bit? I have it running fine on CentOS 6 32 bit, and I 'think' I did identical installs. But, from the command line I keep getting Oct 6 13:36:00.659 [16065] dbg: pyzor: network tests on, attempting Pyzor Oct 6 13:36:06.205 [16065] dbg: pyzor: pyzor is available: /usr/bin/pyzor Oct 6 13:36:06.206 [16065] dbg: pyzor: opening pipe: /usr/bin/pyzor check < /tmp/.spamassassin160655GZkVEtmp Oct 6 13:36:06.281 [16065] dbg: pyzor: [16168] finished: exit 1 Oct 6 13:36:06.282 [16065] dbg: pyzor: check failed: no response And, yes the firewall port is open and I can ping pyzor. Been Googling this for hours now.... lots of returns without any helpful info. And 'odd' that it is running fine on 32 bit. And of course, the 32 bit install is for internal use while the 64 bit system needs to go live to the public really fast! -- John Hinton 877-777-1407 ext 502 http://www.ew3d.com Comprehensive Online Solutions

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Permission question
by Victor Padro 06 Oct '11

06 Oct '11

Hello, We own a CentOS Server which hosts a few domains using Cpanel, however each host or domain has its own user and its own folder under /home, we want a separate user(newuser1) to have read and write privileges in all home's subdirectories so we can do some tasks remotely using WinSCP, that user is already in the sudoers group and the root login is disabled in SSH for security, but I haven't been able to assign the correct privileges and rights to newuser1 using chmod -R owneruser:newuser1 /home/owneruserdir, everytime we login with newuser1 using WinSCP to /home and try to change directory to /home/owneruserdir we receive a permission denied message, so I don't know where else to look. Any pointers will be apreciated. Thanks. -- "Everything that irritates us about others can lead us to an understanding of ourselves"

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Formatting an external USB drive
by Todd Cary 06 Oct '11

06 Oct '11

I have an external USB drive that was formatted with NTFS and I want to use it to backup some files from my Centos 5.5 system. When I check my documentation, I am not certain of the best way to do the formatting. Suggestions welcomed.... Todd -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

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Confgure SAN with Linux
by MARMEY Cyril 06 Oct '11

06 Oct '11

Hi, i'm new to this subject. I try to present a san attachment on my Linux server (OEL 5.5). I'm running a HP server with qlogic 2462 and my SAN Storage is a HP EVA. Zoning is good. I installed HP SanSurfer and i see the vdisk with this utility. But, impossible to see the volume from the os. Fdisk returns me to the local disks, and multipath -l command does not return any info. I installed qlogic drivers, edit multipah.conf, install devicee mapper .... Have you any idea or how to ? I hope I was clear, I started with Linux and I can not put all the necessary information. Thank's for your help Best regards ________________________________ Ce message et toutes les pi?ces jointes sont ?tablis ? l'intention exclusive de ses destinataires et sont confidentiels. Si vous recevez ce message par erreur, merci de le d?truire et d'en avertir imm?diatement l'exp?diteur. Toute utilisation ou diffusion non autoris?e est interdite. Tout message ?lectronique est susceptible d'alt?ration, ASF d?cline toute responsabilit? au titre de ce message s'il a ?t? alt?r?, d?form? ou falsifi?.

2 1

guest vms crash host systems
by Negative 06 Oct '11

06 Oct '11

I built guest vm's one for Windows 7 and one for Windows XP using the virtual machine manager on a just updated to centos 5.7, and they are both crashing the host machine. They run only for a few minutes, but suddenly freeze, crashing the host. There is no networking. No X. No way to drop out of X. The only way out is a hard reboot. I don't see anything in the logs -- messages or libvirt logs -- immediately before the crash. I haven't found anything like this on the web or on this list. The workstation has two xeon E5410s. I noticed that both the kvm-amd and kvm-intel modules are loaded, but don't know if that would cause a problem. I had an ati firepro graphics card in the machine, but suspected that might be the source of some conflict, and I put in an Nvidia card. The vm's were built with all the defaults. The configuration is just about identical to vms I have running on a smaller machine with a dual core Athalon. Thanks for any suggestions.

9 39

CentOS 6 USB changes
by m.roth＠5-cent.us 05 Oct '11

05 Oct '11

Ok, I just managed, after much effort, to rebuild my USB key to install CentOS 6. There are a number of changes. Partition the USB key, but make partition 1, Win 95 (FAT32) (I think that's partition type "b"), bigger. I made it 500M. The rest should be ext3 (or whatever). Format the partitions. Make sure to toggle the bootable flag on partition 1. syslinux /dev/<DOS partition> When you're done, the DOS partition should look like this: ls -laF /mnt /boot/ /ldlinux.sys /syslinux/ Under /boot is /grub, and it's contents. Make sure you create a grub.conf to put in there. If syslinux didn't put it there, mount your .iso, and copy /mnt/iso/isolinux into there, then rename /syslinux/isolinus.cfg to /syslinux/syslinux.cfg. I put a grub.conf here, too: cat /mnt/disk/syslinux/grub.conf #debug --graphics default=0 splashimage=@SPLASHPATH@ timeout 5 hiddenmenu title @PRODUCT@ @VERSION@ kernel @KERNELPATH@ initrd @INITRDPATH@ title Install system with basic video driver kernel @KERNELPATH@ xdriver=vesa nomodeset askmethod initrd @INITRDPATH@ title rescue kernel @KERNELPATH@ rescue askmethod initrd @INITRDPATH@ On the second partition, copy your .iso images. Then copy /mnt/iso/images there. You should be good to go. NOTE: during the install, if you make any partitions encrypted, it will hang when it's done formatting, so reboot, and tell it to install again, and then not to format. It will start, then ask for the password, then actually go through the install. mark

1 0

Firefox 7 on CentOS 5
by Wade Hampton 05 Oct '11

05 Oct '11

Anyone have any luck running updated Firefox on CentOS 5? We have CentOS 5 workstations and need to update their Firefox but it dumps core even when using the libstdc++ from Fedora 9. I would like anything stable and secure beyond Firefox 3 but can't find tarballs for anything other than 7.0.1. CentOS 5.5 i386 w/ updates firefox-7.0.1.tar.bz2 libstdc++-4.3.0-8.i386.rpm from Fedora 9 Thanks, -- Wade Hampton

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