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32 Bit vs. 64 Bit Linux Server installation
by Simon Jolle 09 Nov '07

09 Nov '07

Hi Centos Users What are the advantages of 64 Bit and respective 32 Bit installation of Centos? With PAE 32 Bit installation can address huge amount of RAM. As a desktop system, I prefer 32 Bit installation because of teething troubles in 64 Bit Linux world. When would you choose 64 Bit and when 32 Bit? We are running mostly application and web services. Is this true that with 32 Bit architecture the kernel is limited to 1 GB RAM? cheers Simon -- XMPP: sjolle(a)swissjabber.org

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CentOS 5: comment swap in fstab
by finley＠privacynetworks.com 09 Nov '07

09 Nov '07

I'm not sure what gave me this idea, but I decided to comment out the swap partition in /etc/fstab and reboot my laptop. I did not run swapoff directly at any time. I'm running more things now than I would ever dream of to hammer my 500MB of memory, but I still notice NO slowdown. This is the best desktop experience I've ever had for any OS on any hardware! Here's the first 12 lines in top (CPU) top - 22:57:28 up 2:06, 1 user, load average: 1.11, 0.89, 0.88 Tasks: 97 total, 2 running, 95 sleeping, 0 stopped, 0 zombie Cpu(s): 20.2%us, 2.9%sy, 0.0%ni, 76.2%id, 0.0%wa, 0.1%hi, 0.6%si, 0.0%st Mem: 449556k total, 441840k used, 7716k free, 9420k buffers Swap: 0k total, 0k used, 0k free, 159416k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2921 root 15 0 227m 69m 7312 S 16.2 15.9 22:41.70 X 3317 finley 15 0 240m 25m 8684 S 3.1 5.8 2:32.73 xine 3204 finley 15 0 2160 772 564 S 2.2 0.2 2:02.71 top 3100 finley 15 0 183m 51m 16m S 0.8 11.7 5:03.90 firefox-bin 3116 finley 15 0 223m 39m 2440 S 0.4 8.9 0:54.26 java_vm 3264 finley 15 0 32276 9788 7132 S 0.3 2.2 0:23.74 kpat 3050 finley 15 0 33676 10m 7572 R 0.2 2.3 0:21.28 konsole 3049 finley 15 0 32080 7620 5668 S 0.1 1.7 0:01.62 kscd 3399 finley 15 0 57024 25m 16m S 0.1 5.7 0:08.55 konqueror 1 root 15 0 2028 480 392 S 0.0 0.1 0:00.29 init 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 3 root 34 19 0 0 0 S 0.0 0.0 0:00.06 ksoftirqd/0 Here's the top 12 lines (Mem) top - 22:58:41 up 2:07, 1 user, load average: 1.14, 0.92, 0.89 Tasks: 97 total, 3 running, 94 sleeping, 0 stopped, 0 zombie Cpu(s): 25.3%us, 2.9%sy, 0.0%ni, 71.5%id, 0.0%wa, 0.4%hi, 0.0%si, 0.0%st Mem: 449556k total, 442156k used, 7400k free, 9648k buffers Swap: 0k total, 0k used, 0k free, 159160k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2921 root 16 0 227m 69m 7312 R 20.9 15.9 22:55.56 X 3100 finley 15 0 183m 51m 16m S 0.4 11.7 5:05.54 firefox-bin 3116 finley 15 0 223m 39m 2440 S 0.4 8.9 0:54.60 java_vm 3253 finley 15 0 198m 34m 9.8m S 0.0 7.9 0:07.97 swriter.bin 3317 finley 15 0 240m 25m 8684 S 2.9 5.8 2:35.17 xine 3399 finley 15 0 57024 25m 16m S 0.0 5.7 0:08.57 konqueror 3638 finley 15 0 93632 23m 15m S 0.0 5.4 0:03.80 gaim 3026 finley 15 0 35180 13m 10m S 0.0 3.1 0:05.42 kded 3336 finley 15 0 34232 11m 8776 S 0.0 2.7 1:01.01 kuickshow 3038 finley 15 0 35096 11m 8828 S 0.0 2.7 0:23.91 kicker 3050 finley 15 0 33676 10m 7844 R 0.4 2.4 0:21.53 konsole 3264 finley 15 0 32276 9808 7152 S 0.0 2.2 0:23.85 kpat As you can see, I'm running a KDE environment. I'm going to try this in a gnome environment tomorrow. This is on an HP Pavillion ze4800 I purchased at WalMart a bit over two years ago for ~$900. >From dmesg: AMD mobile AMD Athlon(tm) XP2800+ Memory: 447836k/457664k available Linux info: [finley@c182 ~]$ cat /etc/issue CentOS release 5 (Final) Kernel \r on an \m [finley@c182 ~]$ uname -a Linux c182.pnd.net 2.6.18-8.1.6.el5 #1 SMP Thu Jun 14 17:46:09 EDT 2007 i686 athlon i386 GNU/Linux Hope this makes someone else's day! Steve Finley

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Cheap dual-head pci card with CentOS support?
by mbneto 09 Nov '07

09 Nov '07

Hi, I am looking for a cheap PCI (or AGP) video card with dual output (DVI or VGA) and CentOS support. Any recommendations? I am not interested in games. Thanks.

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CentOS 5.0 - Yum install using the install cd's as the RPM source
by Keith Christian 08 Nov '07

08 Nov '07

What is the mechanism or procedure for installing additional packages from the six CentOS 5.0 CD's using Yum, assuming a secured server with no outside internet connection? Debian based distributions are able to use the package manager to search for and install from the CD's, and I'm looking for the CentOS equivalent. Obviously, it's possible to install "manually" from a CD with: mount -t iso9660 /dev/hdc /media/cdrom cd /media/cdrom/CentOS rpm -U foobar-1.2.3.-4.5.el5.i386.rpm Yum has such good dependency checking I'd like to know of a way to use it if possible. ========Keith

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Help with sound on Packard bell
by Manuel Enrique Chavez Manzano 08 Nov '07

08 Nov '07

Hello to everyone I had a little trouble with my new laptop, I have a Packard Bell MZ380 laptop with Realtek High Definition Audio, I have installed CentOS 5 on it, I have sound by the speaker but when I plug the headphone the sound is over, I mean I have not sound by the speaker and by the headphones. Can someone help me? What I have to do ???? I'll be waiting for help. -- "Nuestra recompensa se encuentra en el esfuerzo y no en el resultado. Un esfuerzo total es una victoria completa". Mahatma Gandhi (@ @) |------o00o-(_)-o00o----------| |Manuel Enrique Chávez Manzano| |manuel864(a)gmail.com | |manny(a)cmc.cfg.sld.cu | |GNU/LINUX User | |#424754 | |Using CentOS 5 | |-------ooo--ooo--------------|

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question about backup regimens
by Marty Landman 08 Nov '07

08 Nov '07

I need to recommend some backup options for a web server running CentOS 4.1. The client prefers using a tape drive as their backup device and has access to safe offsite storage. I was thinking of system backups weekly and differential backups nightly but don't know what software to recommend for the differential b/u's. For full backups I can just schedule a tar and compress using cron. Any recommendations would be appreciated. Marty -- Marty Landman, Face 2 Interface Inc. 845-679-9387 Drupal Development Blog: http://drupal.face2interface.com/ Free Database Search App: http://face2interface.com/Products/FormATable.shtml

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status of Centos 5.1?
by Rainer Traut 08 Nov '07

08 Nov '07

Hi all, now that EL5.1 is out the big question is when will Centos 5.1 be out. I know the answer, when it's ready. But how is status of the problems described here? http://www.karan.org/blog/index.php/2007/10/29/so_when_is_5_1_due Thx Rainer

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Oracle Instant Client 11g on CentOS 5 (32-bit) workaround
by Jay Leafey 08 Nov '07

08 Nov '07

I downloaded the RPMs from the Oracle web site (otn.oracle.com) and successfully installed them on my C5 box, but the sqlplus client software would not run properly. After a few iterations with sealert, I finally got a handle on what was happening. It turns out that most of the shared libraries Oracle installs need to have their SElinux file context modified to allow relocation. Here's the quick-and-dirty routine I use to repair this: find /usr/lib/oracle/11.1.0.1/client/lib -type f -name \*.so\* \ -exec chcon -t textrel_shlib_t {} \; Obviously you could get around this by disabling SElinux, but I really want to avoid that if possible. Now a quick question: does anybody know if there is any way to configure SElinux so that the context for these files won't be "fixed" by a restorecon operation on this directory? Thanks! -- Jay Leafey - Memphis, TN jay.leafey(a)mindless.com

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Centos 5 - Install Hangup
by Tom Browder 08 Nov '07

08 Nov '07

I get to where the installation begins copying packages to the new host and it's time to change CD's to the second one. I get the following message: An error occurred unmounting the CD... make sure you're not accessing /mnt/source from the shell on tty2...click Ok to retry. I click and nothing changes. I go to tty2 and see the #ssh prompt and see nothing interfering (and the umount command doesn't work under the shell). I've tried this three times and can't get past this point. It may be a hardware problem, but other things work on the same system under Fedora 7. BTW, old AMD dual CPU, Gigabyte server MOBO, 1.5 Gb RAM, WD IDE drive, generic IDE CD-RW. ATI Raden graphics card. Any help will be greatly appreciated. Thanks. -Tom Tom Browder Niceville, Florida USA

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Re: CentOS-5.0-x86_64-bin-DVD-ich9.iso.delta md5 mismatch
by Michael Rock 08 Nov '07

08 Nov '07

Michael Rock napsal(a): > all-generic-ide irqpoll > > Without irqpoll it just hangs and without > all-generic-ide it get a kernel panic. So I still > need both to recognize the disk and continue booting. > Michael, > I have tested 8.1.14 ICH9 x86_64 version and it's kring fine. For sure > im right now uploading full DVD isos. I did not want to :o( due due to > bandwidth bud I have to now. Once I have 8.1.15 kernels ready I will > publish updated version. Please send the mobo ID for me to read about > the chipset. I do test ICH9 Centos on this mobo MSI > P35 Neo-FI > http://www.hardware.info/en-UK/productdb/bGRkZZiUmJHK/viewproduct/MSI_P35_N… > Regards, > David I had to get a workstation setup right away for the P5KC so I just ended up using Fedora Test 8 which handled it no problem. (so should be good for about a year) The P5K-VM I was able to setup as AHCI in bios which is why I was able to get as far as I did. But there was no setting to do the same with the P5KC even though I had the latest BIOS. I still need to get the P5K-VM setup and since it is a server I would still like to use Centos. Are the new DVD's ready yet? -- Mike __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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