Discuss August 2008

discuss@lists.centos.org

271 participants
280 discussions

'initrd' image of CentOS (domU) on Ubuntu (dom0)
by Admin Admin 02 Aug '08

02 Aug '08

Hello, What is the best way to get the xen enabled CentOS 5.2 vmlinuz and initrd images for use as a guest domain (domU) on Ubuntu host domain (dom0). Is there a site where these are available? I am hoping that I could use the vmlinuz from the latest kernel rpm, if I go that route, how could I generate the initrd image given that my host is Ubuntu? These are for use with post install of domU, which is setup using xen-create-image. Thanks

4 7

Load Average ~0.40 when idle
by listmail 02 Aug '08

02 Aug '08

I am running CentOS 5 on a dual-dual-core Intel machine, and I am seeing a load average of between 0.35 and 0.50 while the machine is idle, i.e. no processes appear to be running. Both top and uptime report the same thing. Looking at top, I cannot see any processes that are using CPU time except for top and init, and they are not using enough cycles to push up the load average. According to top, there are occasional tiny (like 0.5%) bumps in the system usage occasionally, and almost no user space usage. Again, not enough to account for the load average I am seeing. I have tried a couple of kernel updates, and upgraded from CentOS 5.0 to 5.2, none of which make any difference. Has anyone else seen this? And can anyone recommend a way to figure out what is causing the load average to be this high when the machine is idle? Thanks, --Bill

10 29

Port Closing Question..
by Ryan Nichols 01 Aug '08

01 Aug '08

Is there a software avail or a process that will monitor two ports and if there is no traffic close them so the program that is using them can reuse them? I talked to the vendor and they told me I needed to do this on the NAT/Firewall , but I dont see anything like that on my router. So any suggestions ideas? thanks, Ryan Nichols

5 5

OT: backup media options
by Monty Shinn 01 Aug '08

01 Aug '08

Greetings. Sorry for the OT, but I'm looking for some advice regarding archiving. I've always been a tape archive believer, but with SATA drives becoming more reliable and much larger, I'm wondering if it is time to change my opinion. What are the benefits/pitfalls to begin archiving to "enterprise" level SATA drives? Is it possible to use Amanda or Bacula to archive to a drive, and maintain a archive regimen? Archive to the drive, when the drive is full put it in an anti-static bag, and place it in storage. Possibly archive to a mirrored pair if one is really concerned. We are considering using LTO4 as an archive medium. With the tape densities these days, it appears the tapes are rather fragile, and that head gap seems awful small. Any thoughts are greatly appreciated. Again, I'm sorry for the OT, but I figured I'd get knowledgeable responses from this list instead of sales pitches... Thanks in advance for your time. Monty

2 1

Lost Sound after Firefox crash
by Ed Donahue 01 Aug '08

01 Aug '08

My Firefox crashed and I lost sound, is there a way to release the lock Firefox had on sound when it crashed? I was streaming sirius radio at the time of the crash. Is there a daemon I can restart? I could just reboot but I'm not windows admin :) I logged out of the GUI then back in, would restarting X clear it up?

2 2

selinux & httpd & portmap
by Toby Bluhm 01 Aug '08

01 Aug '08

Having problems starting httpd & portmapper #service httpd start /usr/sbin/httpd: error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory and I traced it to selinux, which I had just turned on for the first time: # sestatus SELinux status: enabled SELinuxfs mount: /selinux Current mode: enforcing Mode from config file: enforcing Policy version: 21 Policy from config file: targeted I can #setsebool -P httpd_disable_trans on and httpd starts - but there's zero enforcing now as I understand it. Further digging & I get to: # cat /var/log/audit/audit.log | audit2allow -m local module local 1.0; require { type portmap_t; type httpd_t; type file_t; class lnk_file read; class file { getattr read execute }; } #============= httpd_t ============== allow httpd_t file_t:file { read getattr execute }; allow httpd_t file_t:lnk_file read; #============= portmap_t ============== allow portmap_t file_t:file { read getattr execute }; allow portmap_t file_t:lnk_file read; Other stuff like postfix, postgrey, amavisd are working fine since turning selinux on. Before I make a mess of things with trying to make a new policy, shouldn't two basic services like portmap & httpd already be allowed to run out of the box by selinux? If not, am I going down the right path to get it working? Thanks -- Toby Bluhm Alltech Medical Systems America, Inc. 30825 Aurora Road Suite 100 Solon Ohio 44139 440-424-2240 ext203

6 17

SLightly OT - Seamonkey still crashes at random
by MHR 01 Aug '08

01 Aug '08

I've noticed recently that even my 32-bit, formally release SM v 1.1.11 still crashes at random. It used to happen when I tried to access certain interesting websites (no, not THOSE, Yahoo moderation pages), but today it crashed when I was managing my bookmarks and tried to move on from one folder to another. Has anyone else noticed this kind of instability in SM (or FF, for that matter, but mainly SM)? Just curious. mhr

3 2

enterprise backup solution (probably amanda?)
by David Hláčik 01 Aug '08

01 Aug '08

Hello guys, hope i am not making an offtopic Currently we are looking for storage/backup solution in our company. Basically we need to backup data incrementaly from windows server and centos server + subversion repositories. So far i believe amanda would be best for this situation and also has good reference. Is there anything else - i would be glad to have space for research and choose backuping solution which fits for my needs best. Thanks in advance! David

12 12

Quation about CentOS 4 xenU kernel
by Kai Schaetzl 01 Aug '08

01 Aug '08

I converted a physical maschine running CentOS 4.6 to a Xen VM on a CentOS 5 host. Almost everything was running when I decided to rsync /lib and /usr a while later in order to get updated files and get the one or two non-working programs to work. There are differences because of the xenU kernel I didn't think about. I forgot to exclude rpm database and /lib/modules. Because the synced rpm database doesn't include the xenU kernel anymore I installed the latest one again. I got this warning: WARNING: No module ata_piix found for kernel 2.6.9-67.0.22.ELxenU, continuing anyway Looking around I don't have this module for the old kernel (2.6.9-67) either. But it's referenced in modprobe.conf. Nevertheless, I could boot the VM. A locate shows this module in all non-xenU kernels under /lib/modules, sometimes in a scsi, sometimes in an ata subdirectory. I still have a backup of the old setup before the sync and this doesn't contain ata_piix in /lib/modules/2.6.9-67.ELxenU/kernel/drivers/scsi either. And no ata directory. So, I'm a bit puzzled now. Do I need that module to boot a Xen VM? If not, why is it modprobed? And why do I get this warning from the xenU kernel? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

2 5

Remounting a USB flash drive
by MHR 01 Aug '08

01 Aug '08

I've noticed that once I right click on my flash drive icon and umount it, in order to remount it I have to unplug it and then plug it back in. Is there a command that will accomplish the same task without the unplug and plug back in physics? Thanks. mhr

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Discuss August 2008