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Motherboards
by Sam Drinkard 05 Oct '05

05 Oct '05

Does anyone have any experience with Super-Micro brand motherboards // dual Xeon cpu's? Had to swap out my Tyan piece of junk and going back with the S-M board. I believe it has similar north/southbridge chips on it -- at least they are the intel MCH ICH5R and PXH plus the 82546GB. One area that the Tyan board was seriously lacking in was in the hardware monitoring department. The S-M board uses a winbond 83627HF chip. Another area I'm wondering about is with the SATA controller. Supposedly the ICH5R supports Raid 0, 1, and JBOD's, but does CentOS handle the sata raid without difficulty? Tnx.. -- Snowman

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/proc process information on centos 4.1
by Jerry Geis 04 Oct '05

04 Oct '05

Alex, I did something simple; on one window did more/etc/mail/sendmail.cf on another window did lsof -o -b -p XXX -w where XXX is hte process number and the SIZE column does not change to OFFSET! the size reflects the size of sendmail.cf - I was hoping the "-o" would change the SIZE column to OFFSET column and show at what offset the program has read into the file? AM I doing something wrong? THanks so much. Jerry >>>/ sender: "Jerry Geis" date: "Mon, Oct 03, 2005 at 10:49:09PM -0500" <<<EOQ />/ Is there a way to tell through /proc or something else which />/ files a process has open and more importantly what position the read />/ pointer is in for that open file? /man lsof <- for the list of files opened by a program man strace <- to take a peak at what the program is doing Have a nice day everyone, Alex

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broadcastclient does not work on CentOS 4.1
by Fong Vang 04 Oct '05

04 Oct '05

This ntp.conf file works fine under RedHat 9: authenticate no #enable auth driftfile /etc/ntp/drift keys /etc/ntp/ntp.keys server 127.127.1.0 fudge 127.127.1.0 stratum 10 trustedkey 1 enable bclient broadcastclient However, it doesn't work on CentOS 4.1. ntpd complains with this error message: Unable to listen for broadcasts, no broadcast interfaces available Has anyone gotten ntp broadcastclient to work under CentOS? This is very similar to the problem explained by this email thread: http://lists.freebsd.org/pipermail/freebsd-questions/2004-August/057010.html Any help is appreciated.

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Re: [CentOS] Symantec ghost and CentOS 3.4/4.0
by Bill Maltby 04 Oct '05

04 Oct '05

> > >Message: 28 >Date: Mon, 03 Oct 2005 11:22:40 -0500 >From: Les Mikesell <lesmikesell(a)gmail.com> >Subject: Re: [CentOS] Symantec ghost and CentOS 3.4/4.0 >To: CentOS mailing list <centos(a)centos.org> >Message-ID: <1128356560.29433.17.camel(a)moola.futuresource.com> >Content-Type: text/plain > >On Mon, 2005-10-03 at 11:06, Ted Kaczmarek wrote: > >>><SNIP> >>> >Or, if the machines are close to identical including the drives, just >use dd to copy the whole disk. It's slow in real-time but takes very >little human time. ><snip> > > With proper use of the bs= parameter to dd, it can be very fast. Just need to watch out that the jobs the node is doing at that time are not unacceptably degraded, since we don't have a preemptive scheduler (? I think... haven't been paying atention the last year or so.) yet. Using a blockisize that takes advantage of cache sizes (several levels of these) would be optimal, but the 80/20 rule seems to apply here. So I always just use a block size that is a cylinder (not really a cyl, but who knows what they really are these days?) based on the HD parameters. What's really important is not the size, but the reduction in number of system calls. Anyway, not a major issue, but since I luv dd (and ed and other old time real *IX stuff) I didn't want it to get a bad rap! ;) > -- Les Mikesell lesmikesell(a)gmail.com > Bill

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Re: [CentOS] Lost my menu options again - KDE messes with
by Bill Maltby 04 Oct '05

04 Oct '05

Dave Gutteridge <dave(a)tokyocomedy.com> wrote: > Date: Mon, 03 Oct 2005 23:41:57 +0900 <snip> > >>> ---- >>> useradd -p PASSWORD -m roger >>> ^ needs a ^ >>> space | >>> | what are you trying to accomplish here? > > >The web page where I got the command said I needed it. Said it was to >create a home directory. > >In any case, I tried: >useradd -p password testguy > >and I still can't log in at the GUI prompt with the username "testguy" >and the password "password". I don't know what was on the web page, but when things don't behave as expected, it's always worth looking at a man or info page. In this case, you would see that you did not use the "-p PASSWORD" param correctly. Why? A qualifying phrase often overlooked, "... as returned by crypt(3)". Exactly how they intended to make this administrator-friendly is not apparent to me. I've not easily found a CLI that will return an encrypted version of a proposed password, allowing something like passwd -p `encryptit password` ... 'Course, my forte is not administration, so I may be just ignorant (at least, I hope that's all it is :)) ). Most folks just byte the bullet, even in scripts, and type it in at the console. Or grab an encrypted starter passwd (possibly copied from /etc/passwd or /etc/shadow (more likely) ?) and use that and specify that passwd must be changed upon initial login. ><snip> Bill

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heartbeat + DRBD + audit
by Alberto 04 Oct '05

04 Oct '05

I have configured a MQ cluster with heartbeat and DRBD. When cluster switch and starts drbd disk on the other node, audit kill it and cant switch the service. Oct 4 17:22:24 c-229 heartbeat: info: Running /etc/ha.d/resource.d/drbddisk drbd_var_mqm start Oct 4 17:22:24 c-229 kernel: audit_intercept: error 14, killing task If I disable audit it works ok!! what is the problem? Why is audit killing this task?? Alberto

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LVM & Knoppix
by Robert 04 Oct '05

04 Oct '05

I'm probably missing something very simple. My hard drive looks like this: [root@mavis ~]# fdisk -l Disk /dev/hdb: 163.9 GB, 163928604672 bytes 255 heads, 63 sectors/track, 19929 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hdb1 * 1 13 104391 83 Linux /dev/hdb2 14 19929 159975270 8e Linux LVM Inside the Logical Volume there are my / partition and swap partition and CentOS4 sorts it out just fine. [root@mavis ~]# mount /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) <snip> /dev/hdb1 on /boot type ext3 (rw) However, if I boot e.g. KNOPPIX, I'm unable to mount anything except the /boot partition on hdb1. Is there any way out of this intolerable situation other than doing a full backup, repartitioning the hard drive without that damnable LVM and restoring the whole thing from the backup?

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RE: [CentOS] Centos for SPARC- when?
by Plant, Dean 04 Oct '05

04 Oct '05

Chris Mauritz wrote: > Plant, Dean wrote: > >> The Centos website talks about a SPARC release, how is this coming >> on? and is there an approximate release date? >> >> >> > > Just curious...why would you want to run CentOS on a sparc system > instead of Slowlaris? Or have I just answered my own question? 8-) > > Cheers, I have a few 1U netra SPARC machines sitting around I would like to setup some yum repositories on them, also some services are a lot quicker to configure on Linux as more packages are available in the distribution, although blastwave.org make this easier for Solaris. Dean

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/proc process information on centos 4.1
by Jerry Geis 04 Oct '05

04 Oct '05

Is there a way to tell through /proc or something else which files a process has open and more importantly what position the read pointer is in for that open file? As an example if I am reading a file with a program I have no control over, and I kill that program, I need to know when in the data file that program was reading at that time. Is this information available and if so how to read it? Thanks, Jerry

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Cron script crashing server...
by Ian mu 04 Oct '05

04 Oct '05

Hiya, have a bit of an odd problem so looking for thoughts before proceeding any more. Problem is on centos3 (also runs fine on another but fails on another, so not sure this is an issue or not), dual xeon setup. Basically I have a perl script that runs once, first thing every morning, gathering some stats (currently turned off due to problem). Crontab -l shows the following... 00 6 * * * nice /home/statsman/stats/run_stats.sh >/dev/null 2>&1 (.sh file basically sources with full path a config with some vars, then runs the perl script). There are a couple of other scripts in the crontab which run absolutely fine, so cron itself seems to be working, its just the combination. If I run this (at that time or anytime) via cron, the whole server totally dies no warning, nothing in logs instantly. If I watch in top waiting for the cron you don't even see it appear, machine just totally hangs, can't ping or anything, needs a cold boot. Nothing in logs or anything apart from bootup info after. If I run the perl script outside of cron from any folder at all, it works fine, never crashes which is where I'm confused, its only as soon as its run from cron. To test I've put it on a test machine, and to confuse it further runs absolutely fine under cron (old redhat install though) no matter what I do, it also seems to run fine on other machines (except one with identical problem) and runs fine from cron on other linux dists/machines, but can't do as much testing on them. I'm really not sure where the problem lies, so may be offtopic, I'm just confused why it runs on some and not others (although maybe running the same version, its possible they were configured slightly different on install), and pretty much clutching at straws. Worse thing is machines a production one, and want to keep downtime to a minimum, so trying to get some angle on what may be wrong before testing more. Any thoughts much appreciated. Ian

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