Discuss July 2008

discuss@lists.centos.org

347 participants
435 discussions

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

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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

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

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

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PXE Booting floppy image
by Joseph L. Casale 01 Aug '08

01 Aug '08

Anyone know the correct syntax for specifying a floppy image in the /tftpboot/pxelinux.cfg/default file? I am trying to use: label Dos Bootdisk MENU LABEL Dos bootdisk FDIMAGE discimage.img But when I select it the menu, I get a message saying "Automatic boot in 30 seconds" and nothing happens. I would use: label Dos Bootdisk 2 MENU LABEL Dos bootdisk 2 kernel memdisk append initrd=discimage.img but this is a 2.88meg floppy and memdisk wont boot it? Thanks! jlc

3 3

unsubscribe
by Rajeev R. Veedu 01 Aug '08

01 Aug '08

Rajeev R. Veedu

3 2

01 Aug '08

I asked one of my team mates to evaluate centos 5.2 as a more stable distro for our business use than Fedora which we have used for years. His main objection so far has been the lack of a neat feature of recent Fedoras (at least since 7) that allows a user to login as himself if the screen is locked by another user (a switch user feature). Is that feature available or is it planned? Thanks. -Tom Tom Browder Niceville, Florida USA

3 3

Logrotate is not happing without -f option
by Balaji 01 Aug '08

01 Aug '08

Dear All, Currently i am using CentOS 4.4 Linux Logrotate is not happen without -f option I have executed the following logrotate /etc/logrotate.conf manually and Logrotate command exit without any error messages If i executed with -f option then Logrotate will happen I am not sure why this is happening. Can some one throw light on this. Regards -S.Balaji

4 6

Restricting User Rights massively
by Dirk H. Schulz 01 Aug '08

01 Aug '08

Hi folks, is it possible to restrict the rights of a user to only do few, defined actions, e.g. only look up cpu and memory usage, but not walk around in the file system, not see any other hardware details, run any binaries/scripts? I know several different techniques to achieve parts of this (like chrooting him), but is there one technique to get it all? Dirk

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Discuss July 2008