Discuss January 2007

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Squid 2.6 RPM
by Matt 26 Jan '07

26 Jan '07

CentOS 4.4 includes squid-2.5.STABLE6-3.4E.12. Can anyone tell me where to find a 2.6 rpm? Matt

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RE: [CentOS] Problems with building a complete kernel
by Mark Hull-Richter 26 Jan '07

26 Jan '07

Thanks - I'm still working on it. Does anyone know where there is a clean, working source for Centos 2.6.9-42.0.3 (supposedly the 4.4 final)? I'm pretty sure the one I have is NOT the right one.... -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Jim Perrin Sent: Thursday, January 25, 2007 2:47 PM To: CentOS mailing list Subject: Re: [CentOS] Problems with building a complete kernel On 1/25/07, Mark Hull-Richter <mhull-richter(a)datallegro.com> wrote: > I have a plain vanilla Centos source (not 100% sure where we got it > from), but I can't seem to get a build that installs correctly. Welcome to the joy of building custom kernels. > I tried the method described at > http://wiki.centos.org/HowTos/Custom_Kernel, but rpm doesn't like the > output file, and even if I install it with -F, nothing seems to happen - > no new kernel, now initrd, nothing. Something in your build process has likely failed. Also, -F is to 'freshen' an existing package. This is something you most definitely DO NOT want to do with a kernel. > When I tried following the directions in the README file that came with > the source, I built the kernel just fine, but the instructions then go > on to describe how to modify LILO to make the install work, and my boot > loader is GRUB - not sure how to reconcile those two. Look at your /etc/grub.conf and add a stanza like the others, but with your kernel info. It should be pretty straight forward. > > So, I built yet another kernel (rpm) following the guide at > http://www.howtoforge.com/kernel_compilation_centos, and the rpm built > just fine, but when I run mkinitrd, it complains that I don't have the > ahci module in my kernel. The only reference I have found to ahci is in > my boot setup, and it is already enabled, so, once again, I am stuck. > Anyone have any ideas here? Yes. Follow one guide at a time. This will keep you from dragging your problem around with you. Troubleshoot why your build failed the first time around. > > I'm running Centos 2.6.9-42.0.3ELsmp on a Dell Precision 390 (P4/HT > 3GHz, 2Gb mem, ATI FireGL 4700, 160Gb SATA, ... Seems fairly common hardware. Are you sure you need to rebuild? Perhaps the centos wiki was not stern enough in discouraging custom builds for a plethora of reasons. What feature is it that you wish to enable in your custom kernel? -- 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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Badness in i8042_panic_blink at drivers/input/serio/i8042.c: 992
by yogeshwar sonawane 26 Jan '07

26 Jan '07

Hi all, I am getting this error while kernel hangs. I am using CentOS 4.4 (x86_64) on Dual Opteron 4 way SMP machine. After searching, i didn't found a sound answer. If anybody know the solution, plz let me know. Thanks in advance, Yogeshwar

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backup exec client for centos/linux?
by Karl R. Balsmeier 25 Jan '07

25 Jan '07

Hi, am just setting up some devboxes and would like to start backing CVS up to tape using our existing setup -anyone heard about a backup exec client for linux/rhel? I used to use HP Dataprotector 5.1 and it worked fine -any word on this other client would be great. am searching symantec/veritas site high and low... -karl

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Best Board Your Ever Ran CentOS On?
by Karl R. Balsmeier 25 Jan '07

25 Jan '07

Hi, Whats' the best motherboard you ever ran CentOS on? --------- Don't read this unless you have lots o' spare time, and please, no flamers or kook-jobs with wierd attitudes, this is just plain old hardware as it relates to centos talk -no politic or mean folks. Background (why I ask about centos-friendly hardware): As I order alot of servers, I have alot of vendors telling me all sorts of stuff. It gets pretty extreme sometimes. I play poker each Sat. eve with a Google Engineer, but we never talk about work. One day we might, but I thought i'd ask the list, because there are alot of vendors out there who contradict just about everything I see on the list that I consider to be excellent advice, given by really talented and positive-minded folks, true professionals. One thing I remember reading about Google is that they choose commodity hardware and engineer the $%^&* out of it and basically add it into a hive/clusterlike existence where it metes out it's daily java/mail/database/ftp/memcache sessions. The modular nature of the hardware allows both scaling, and spontaneuous disaster recovery of very high quality. http://news.com.com/2100-1032_3-5875433.html I have chosen to follow the same logic, or at least continue down the path of those before me that made this choice. From my view, my CentOS machines that never break, run happiest on AMD-friendly boards, with older onboard Broadcomm GBnics that support NIC bonding and handle excess internet & internal snmp (cacti & nagios) traffic without blowing up. I can rave about Crucial (Micron) RAM, and AMD Opteron CPU's, and Seagate & Fujitsu SCSI SCA 80 pin drives, Chenbro 2U rackmount 6* SCA cases, Zippy redundant power supplies, LSI Logic MegaRAID 320-2 controllers -but the basis of it all is the board. It's got all the other parts no one talks about. It's the source of many a dmesg output. With the right board, life is much much easier. Right now I run using Tyan S288@UG3NR-D Dual Core Opteron SCSI SATA GBe LAN boards. I have a vendor that consistently says they get complaints on Tyan boards, but out of the cluster, none of mine have ever died. The Dells die, and get replaced. The remaining Sun's, seem to never die even though I wish they would. Not that i'm a fan of Tyan, -but oddly enough this particular board works great. I noticed alot of the hardware advice Johnny gives (hardware & advice/fixes) just so happens to coincide with vendors saying the exact oppposite thing. They say go with ATI and broadcomm right when he's actually helping someone fix something related to one of those components. Sometimes on the same day. If we as engineers are to have any say in our industry, it's going to happen when we all talk outside the box of BS theory and FUD or over-analysis or analysis-for-analysis'-sake. Right now Intel has things such that it's actually a little difficult to find a stock 2U production linux system unless you actually break it down part-by-part and vet the whole thing. Just curious about your opinions and advice -is there a spec you follow that you like? Way back when, you'd either order a Supermicro-type system, or get a VA Linux type machine. What do you do now? If you happen to be trying to spec out a solid Linux server, I can say that the spec I arrived at handles over 100,000,000 page views a week -that's 1/3rd of CNET. It's all CentOS, the whole thing. A percentage of you might have travelled across them, especially if you happen to read news on the web. Commodity is the way to go. Get 40 servers for the price of one commercial vendor machine. CentOS is very real my friends -let's talk hardware! Maybe we can help the centos project out by doing so. I have to say, i'm sticking with my own hardware choices, -so please don't view this as someone trying to get a hardware spec for free -the intention here is to solidify our own base as centos users, sysadmins. -krb

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mount initrd
by Denis Machard 25 Jan '07

25 Jan '07

Hi, I try to mount the file /boot/initrd-2.6.9-42.ELsmp but I have a error [root@localhost ~]# cp /boot/initrd-2.6.9-42.ELsmp.img /root/ [root@localhost ~]# mv initrd-2.6.9-42.ELsmp.img initrd-2.6.9-42.ELsmp.gz [root@localhost ~]# gunzip initrd-2.6.9-42.ELsmp.gz [root@localhost ~]# mount initrd-2.6.9-42.ELsmp /tmp -o loop [root@localhost ~]# mount: you must specify the filesystem type why ? Denis

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problem with CUPS
by Rajeev R Veedu 25 Jan '07

25 Jan '07

I have made a CUPS print server and unable to load printer driver nor able to install the printer on the windows machine. The error I am getting is as below: - "Windows can not locate suitable printer driver. Contact your administratorxxxxx" I can print test page from the cups panel and the printer works fine. I tried to upload the driver through windows machine by right clicking the properties saying no and clicking advance property tab, the new driver tab is not highlighted. Is it anything related to permission problem? I am using Centos 4.3 + samba 3.0.22. Please find below my SMB.conf file and would really appreciate if some one could tell me where I am going wrong! Thanks Rajeev [Global] load printers = yes passwd chat debug = Yes idmap gid = 10000-20000 admin users = root host msdfs = Yes wins server = 192.168.1.223 null passwords = Yes domain master = No winbind use default domain = Yes public = yes passwd program = /etc/passwd %u template shell = /bin/bash lock directory = /tmp/samba dns proxy = No netbios name = PrintSrv printing = cups writeable = yes server string = Print Server printing = cups writeable = yes server string = Print Server idmap uid = 10000-20000 password server = 192.168.1.225 winbind nested groups = Yes unix password sync = Yes local master = No workgroup = DOMAIN os level = 0 update encrypted = Yes printcap name = cups security = DOMAIN preferred master = No winbind separator = / winbind cache time = 10 [Data-01] comment = Data-01 path = /Data create mask = 0777 directory mask = 0777 guest ok = Yes [Home] comment = Home Directories valid users = %S public = no writable = yes printable = no create mask = 0640 directory mask = 0755 browsable = no [printers] comment = All Printers browseable = yes printable = yes writeable = yes path = /var/tmp guest ok = yes print command = lpr -r -P'%p' -J'%j' -U'%U' %s [print$] comment = Printer Drivers path = /var/lib/samba/drivers/ create mask = 0664 directory mask = 0775 guest ok = yes write list = rvrajeev

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nscd crashes
by Josh Kelley 25 Jan '07

25 Jan '07

I've had problems with nscd crashing every few days on my CentOS 4 mail server for a while now. The problems started maybe around CentOS 4.2, although I don't remember for sure. My debugging efforts let me to disable nscd's persistent cache, and that seemed to work for a while, but since upgrading to CentOS 4.4, the crashes have started again. When nscd crashes, the rest of the system becomes unreliable. Dovecot hangs when new users attempt to log in (fixed or worked around by switching Dovecot versions), and MIMEDefang (which we use for mail filtering) starts failing when it tries to process mail. A bit more information about our configuration: We use nss_ldap and pam_ldap against a failover pair of Fedora Directory Servers. nscd is also crashing on another of our servers (a fileserver) but with less regularlity; on our other servers, it works fine, even without disabling the persistent cache. Has anyone seen similar problems with nscd? Any tips for debugging it? I can use gdb, strace, etc. if I have to, but that can be time consuming, and it's hard to take the time to do that when people are yelling about the mail server being down. (Does CentOS provide debuginfo RPMs?) Thanks. Josh Kelley

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qt3-devel packages
by Devraj Mukherjee 25 Jan '07

25 Jan '07

Hi Everyone, I am trying to build rpms for a product called Rivendell for CentOS 4.4 (http://www.salemradiolabs.com/rivendell/) One of the packages requires a package called qt3 and qt3-devel All searches reveal this package to be available for SuSE. Any ideas if this is available for CentOS/EL4? Or a src.rpm that I can use? Thanks for your time. [root@foreground ~]# rpm -ivh /usr/src/redhat/RPMS/i386/libradio-*rpm error: Failed dependencies: qt3 is needed by libradio-0.97.4-1.i386 qt3-devel is needed by libradio-devel-0.97.4-1.i386 [root@foreground ~]# -- "I never look back darling, it distracts from the now", Edna Mode (The Incredibles)

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RE: [CentOS] OOT: Advice on failover rsync setup
by Mark Schoonover 25 Jan '07

25 Jan '07

John Summerfield wrote: > Mark Schoonover wrote: >> Benjamin Smith wrote: >>> On Wednesday 17 January 2007 04:41, Karanbir Singh wrote: >>>> Fajar Priyanto wrote: >>>>> I have a task on setting up a cluster of 2 servers for providing >>>>> ftp service. We use RH's Cluster suite. However the cluster setup >>>>> is lack of shared network storage, so the /var/ftp/pub is mounted >>>>> on each server. The cluster is set >>>>> >>>>> So, are we on the right direction? Or is there any better way? >>>>> Thank you very much, >>>>> >>>> have you considered using drbd ? >>> Well, I was going to suggest using RAID1 with one of the partitions >>> being a network block device, but this looks even better! >>> >>> Rsync is great for period backups (not more than once per day or so) >> >> I run rsync every hour on multi-terrabyte systems with no problems. >> The NASes do have a private GB network to push the data through, so >> the user network doesn't see the network traffic generated by rsync. >> I can have anywhere from just a couple hundred megs, to 100 gigs of >> data change inside of an hour. > > OTOH I found running rsync daily over the Internet to backup a Linux > box impractical; it used heaps of RAM (and swap) and ran for hours. > Fortunately, its excessive use of swap (several times real RAM) didn't > lead to thrashing. > This seems rather odd performance for rsync. As I type this, I'm sending 800GB to a new server, and rsync is using 28MB of RAM. I don't think network speed is an issue with how much RAM/SWAP is getting used by rsync. Could you post your rsync command, I'm curious to what your running. What version of rsync are you using?? > Now, I run a hand-crafted script that makes a compressed ISO > (mkzftree) and I rsync that. I'm maintaining a backup filesystem of > about 8 Mbytes remotely now; the rsync runs for a little over two > hours daily. That's what I love about *NIX, more than one way to skin a cat! Thanks! Mark Schoonover IS Manager American Geotechnical - California, Nevada and Arizona V-> 858.450.4040 F-> 714.685.3909 C-> 858.472.3816 * software development * systems administration * networking * security *

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Discuss January 2007