Discuss February 2007

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259 participants
310 discussions

Re: [CentOS] SATA controller Dell Optiplex 745
by kuilin lu 10 Feb '07

10 Feb '07

as far as to CentOS 4.4, a work-around solution for Optiplex 745 ICH8 controller is to add "all-generic-ide" as a kernel parameter during installation. The sata disk is recognised as "/dev/hda" , but the disk speed is actually normal, as the followings: hdparm -tT /dev/hda /dev/hda: Timing cached reads: 4776 MB in 2.00 seconds = 2388.36 MB/sec Timing buffered disk reads: 182 MB in 3.02 seconds = 60.29 MB/sec please dont't forget to add "all-generic-ide" again in grub.conf at the first boot. sles 10 (2.6.16.21-0.8-smp) works well on Optiplex 745. So I think a final solution is using RHEL 5 that we should be waiting at this moment. I ask everyone's pardon for my poor english.

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Intel 3000 and 5000 chipsets?
by Mike 10 Feb '07

10 Feb '07

Greetings. HP claims RHEL 4 supports their servers with the Intel 3000 and 5000 chipsets. Has anyone had any trouble/success building machines that use this? For example, CentOS 4.4 on http://www.supermicro.com/products/system/1U/5015/SYS-5015M-T+.cfm Thx. Mike

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Disabling Password authenitication with SSH
by Ski Dawg 10 Feb '07

10 Feb '07

Hello everyone, We are setting up a server at work, and we have run into something that I am not sure how to resolve. We have set up sshd (OpenSSH server) on the machine. We have placed ssh keys into each user's home directory that needs to access the system (and they work). We want to disable everyone from logging in, using a password, utilizing ssh keys only to access the system. I have modified /etc/ssh/sshd_conf to have these settings: ChallengeResponseAuthentication no PasswordAuthentication no UsePAM no I then restarted the ssh daemon (/etc/init.d/sshd restart), but it still allows the user to login using their password. What am I missing? Searching google, only turned up the changes that I made above, so I am unclear what else that I need to do. Any guidance would be greatly appreciated. -- Doug Registered Linux User #285548 (http://counter.li.org) ---------------------------------------- Random Thought: If all else fails, immortality can always be assured by spectacular error. -- John Kenneth Galbraith

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RE: [CentOS] CentOS 2.6.9-42.0.8 issue - no keyboard after reboot
by Mark Hull-Richter 09 Feb '07

09 Feb '07

Where do I find your xfs source? Thanks. -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Johnny Hughes Sent: Friday, February 09, 2007 10:55 AM To: CentOS ML Subject: Re: [CentOS] CentOS 2.6.9-42.0.8 issue - no keyboard after reboot <redacted> If you are building in xfs from the 2.6.9 series kernel an using that version, you are asking for trouble. I have provided xfs kernel modules that contain the latest code from SGI that can be installed against either the standard kernels or the CentOS Plus kernels. If you value your data .. DO NOT USE the 2.6.9 standard xfs kernel code.

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Steps to create a mirrored CentOS system?
by Dale 09 Feb '07

09 Feb '07

Hi all, I am about to re-build one of my boxes with CentOS 4.4 I would like to set it up as a simple mirrored system. The box is a 1U server and has 3 SCSI drive bays. I can use 1 drive as the OS drive and the other 2 for the content (basically websites) or can just use 2 drives and mirror those. What would you folks recommend? Thanks Dale

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CentOS 2.6.9-42.0.8 issue - no keyboard after reboot
by Mark Hull-Richter 09 Feb '07

09 Feb '07

I did this twice now, although the first couple of builds seemed to work ok, they just weren't configured quite right. On my third and fourth builds of the 42.0.8 kernel rpm, when booting, kudzu came up and ran, but the keyboard was somehow not recognized and I had to reboot using the mouse on the login screen (no text appears no matter what I type). I'm using the rpm build strategy from Jim's wiki, which works nicely, but my fallback is a 42.0.3 non-smp kernel. My main question, though, is how did this happen? Is there a config switch or something else I missed? I'm using the base kernel-2.6.9-x86_64-smp.config, and tweaking it to include ext3 and xfs in the kernel (instead of loadable ext3 and no xfs). Why? Well, we need xfs to load so we can find out why it's so damned slow on cached vs. direct i/o. We have some tweaks we put into xfs (current version, using SuSE Linux 9.something) in order to be able to control the way the extents are allocated. We need to be able to do large i/os in large chunks quickly, and that kind of allocation works better than little pieces all over the place. (We're looking at 8Mb chunks and larger.) With direct i/o, we can get around 30-40Mb/s transfer rates, but with cached (i.e., kernel) i/o, we are stuck at 8, which is too slow. It turns out we get better performance from jfs, but we want to use xfs because it is faster with our changes. The main issue here, though, is the failure of CentOS 2.6.9-42.0.8 to recognize the keyboard - why would that happen? Thanks. mhr

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RE: [CentOS] Problem with 2.6.11.4 kernel and e1000 driver -Correction
by Mark Hull-Richter 09 Feb '07

09 Feb '07

We're looking at 2.6.16 or higher now, and also 2.6.9-42.0.8 (CentOS 4.4 updated) - thanks. -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Peter Kjellstrom Sent: Tuesday, February 06, 2007 11:02 PM To: centos(a)centos.org Subject: Re: [CentOS] Problem with 2.6.11.4 kernel and e1000 driver -Correction On Wednesday 07 February 2007 03:21, Mark Hull-Richter wrote: > 1) I'm actually not building a custom kernel per se, just one from the > standard 2.6.11.4 with our configuration. I may be adding a custom > driver, but unless I can get the standard kernel to boot,... Custom is defined as not-a-centos-one. > 2) I have been told that after 2.6.11.4, support for the Infiniband > driver is dropped, and we need that. Both Centos-4.3 and 4.4 (2.6.9-34.xx and -42.xx) has comparable or newer infiniband drivers though I recommend that you download and install ofed-1.1 (and that you use latest 4.4, 2.6.9-42.0.8). If you do feel the need to use a kernel.org kernel then I _really_ recommend using a newer one than what you tried. 1) do you think the first ever infiniband drop for the mainline kernel is what you want? 2) how many security problems do you think there are in that old kernel? (hint: quite a few). So go with 2.6.19.x for x as large as you can find. /Peter > If this is not the case, I would > be delighted to know that and proceed accordingly. I'm not sure, but I > believe that CentOS version 5 will not happen soon enough for what we > need. > > Thanks. > > mhr

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RE: [CentOS] Problem with 2.6.11.4 kernel and e1000 driver -Correction
by Mark Hull-Richter 09 Feb '07

09 Feb '07

I hear you, and this would not be my best choice either. New issue coming shortly, with the 42.0.8 distribution rpm.... Thanks, all! mhr -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Jim Perrin Sent: Wednesday, February 07, 2007 4:27 PM To: CentOS mailing list Subject: Re: [CentOS] Problem with 2.6.11.4 kernel and e1000 driver -Correction > Again, this works exactly as is on 32-bit builds. It only fails on the > 64 bit build. Is this a completely clean x86_64 box you're building on? Any i386 packages on it? You could very likely be getting cross-chatter across library arch versions if not. <soap box>This is one of the reasons I recommend against doing stuff like this. You introduce loads more variables into your sys-admin time vs duties vs system stability matrix. In addition, if you build fresh on every new box, you can end up with sporadic and unreproducible problems due to subtle differences. </soap box> -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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CentOS-announce Digest, Vol 24, Issue 5
by centos-announce-request＠centos.org 09 Feb '07

09 Feb '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-2007:0008 Moderate CentOS 4 x86_64 dbus - security update (Johnny Hughes) 2. CESA-2007:0008 Moderate CentOS 4 i386 dbus - security update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 08 Feb 2007 20:06:35 -0600 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2007:0008 Moderate CentOS 4 x86_64 dbus - security update To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <1170986795.5611.7.camel(a)myth.home.local> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2007:0008 https://rhn.redhat.com/errata/RHSA-2007-0008.html The following updated files have been uploaded and are currently syncing to the mirrors: x86_64: dbus-0.22-12.EL.8.i386.rpm dbus-0.22-12.EL.8.x86_64.rpm dbus-devel-0.22-12.EL.8.x86_64.rpm dbus-glib-0.22-12.EL.8.i386.rpm dbus-glib-0.22-12.EL.8.x86_64.rpm dbus-python-0.22-12.EL.8.x86_64.rpm dbus-x11-0.22-12.EL.8.x86_64.rpm src: dbus-0.22-12.EL.8.src.rpm

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SATA controller Dell Optiplex 745
by Henk van Lingen 09 Feb '07

09 Feb '07

Hi, The CentOS 4.4 installation doesn't work on a Optiplex 745 because it doesn't support the sata controller. Is there a known work-around? (smaller prob: dvi video doesn't work at install time, vga only) If only we had CentOS 5 :-) Cheers, -- Henk van Lingen, Systems Administrator & DBA (o- -+ Dept. of Computer Science, Utrecht University. /\ | phone: +31-30-2534107 v_/_ http://henk.vanlingen.net/ http://www.tuxtown.net/netiquette/

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Discuss February 2007