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Creating a Roaming imap account
by Anne Wilson 05 Feb '08

05 Feb '08

This (CentOS5.1) box is my new imap server. Using system-config-security-level I opened port 143 tcp, and mail is readable throughout the LAN. I want a Roaming account on my laptop so that I can read mail while away from home. I have set up the account in kmail, and I know that that part is correct, as it worked on my old, less-secured, imap server. However, I haven't been able so far to make a connection. Do I need 143 udp open? What else must I do to allow me to connect over WAN? Thanks Anne

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32 bit applications on 64 bit machine
by Rozsa Sandor 05 Feb '08

05 Feb '08

Hi people, I have a 64 bit Centos machine. My problem is that I can't run 32 bit applications on that. I can compile with the 32 bit option my sources, but when I'm trying to run them I obtain the following error message: -bash: ./a.out: cannot execute binary file And the file a.out returns the following: a.out: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped Any suggestions what I have to install or any links. Thanx s --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

4 4

cpu type
by Jimmy Bradley 05 Feb '08

05 Feb '08

I have a quick question. The board and CPU that I'm using in one of my machines was given to me. I didn't take the time to look up the info on the board or anything. I was busy, so I just put the board in a pc case, hooked everything up, and loaded the os on the machine. I didn't know it at the time, but there's a chance it may be a 64bit board and cpu. I don't want to pull the machine out of the desk, and open it up to find out. Is there a command entered by way of the terminal window that will tell me what kind of cpu I have? I want to say that it's an AMD sempron 3000+, but I'm not sure. Thanks Jim

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Re: [CentOS] system gets suspended automatically!
by David G. Miller 05 Feb '08

05 Feb '08

Chandra <shekharc.2004(a)gmail.com> wrote: > Hello! > > I am running CentOS-5 with latest kernel available by deault (2.6.23). > I installed it on a Dell XPS machine having Intel Quad processors (4 > parallel cpus). I use it to run a computational program and I need to > keep the program running for 1-2 months continuously. I generally boot > it in runlevel-3 with network ON without X and use ssh from another > machine to connect and run the program using the "nohup" utility. > > However, the system automatically gets suspended (the computational > program stops, ssh stops working, whole the OS seems to be freezing) > after 4-5 hours. I have stopped the "acpid" daemon and boot the kernel > with "acpi=off" option in "grub.conf" but no help. The kernel log ( > /var/log/messages) doesn't show anything special. After the instant of > suspension, kernel also stops logging into "/var/log/messages". > > Please help me out. I think there is a kernel problem. I have run > programs for days and days continuously using FC5 (which had older > kernel). I can't use FC5 or older version of CentOS because I need > GCC-4.1.2+ to compile parallel OpenMP program. > > Thank you, > > Chandra What do you have to do to get the box out of "suspend?" If the system is frozen and you have to reboot the box to "unfreeze" it, I'd guess it's a heat issue. Cheers, Dave -- Politics, n. Strife of interests masquerading as a contest of principles. -- Ambrose Bierce

1 0

Cluster fun
by Scott Ehrlich 05 Feb '08

05 Feb '08

I've priced some 1 and 2U Dell servers. Now, I'd like to perform a price comparison of COTS hardware for 1 and 2U servers. What VAR companies do people recommend I check out for putting machines together? I'm perfectly capable of installing and swapping hardware components when/where needed, so on-sight support is not needed. Thanks much. Scott

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Re: Install on two discs with Software Raid and LVM
by David G. Miller 05 Feb '08

05 Feb '08

Scott Silva <ssilva(a)sgvwater.com> wrote: > on 2/4/2008 2:43 PM Joseph L. Casale spake the following: > >>> >> Create a swap lv in the vg you created out of /dev/md1, assuming /dev/md0 is /boot. >>> >> >>> >> -Ross >>> >> > >> > Oh, I thought it wasnâ€™t good to run swap inside software raid? If I was wrong, >> > I assume this is beneficial since if one of the HDâ€™s tanks while its running, > it will survive the failure and not need to reboot? > >> > >> > Thanks! >> > jlc >> > That is an old assumption from the infancy of software raid, less than optimal > installed ram, and slower processors. When ram was expensive, you used more > swap because it was cheaper. But ram is so much cheaper now that it make no > sense to run a machine that needs to touch swap except in an emergency. > Not really a valid assumption about install enough memory and swap won't get used. *nixes have a design feature that swaps out programs that aren't used "just in case" the some other program needs the space. Sun workstations back in the '80s and '90s used to be the worst at this. It was faster to shutdown at night and restart in the morning since leaving the system up all night would result in most everything getting swapped out to disk "just in case" the space would be needed. Try to use the system in the morning and it would be busy swapping everything back into RAM for quite a while. So with 2GB of RAM on my desktop, I still see 144K of swap getting used with me generating very little activity as I read my e-mail. If my swap "went away", I would have a problem if Linux tried to swap back in whatever that 144k of program is. Better to have swap on a RAID volume. Cheers, Dave -- Politics, n. Strife of interests masquerading as a contest of principles. -- Ambrose Bierce

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CentOS-announce Digest, Vol 36, Issue 1
by centos-announce-request＠centos.org 05 Feb '08

05 Feb '08

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-2008:0055 Moderate CentOS 4 x86_64 kernel - security update (Johnny Hughes) 2. CESA-2008:0055 Moderate CentOS 4 i386 kernel - security update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Mon, 04 Feb 2008 11:59:19 -0600 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2008:0055 Moderate CentOS 4 x86_64 kernel - security update To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <47A75277.5020701(a)centos.org> Content-Type: text/plain; charset="iso-8859-1" CentOS Errata and Security Advisory 2008:0055 https://rhn.redhat.com/errata/RHSA-2008-0055.html The following updated files have been uploaded and are currently syncing to the mirrors: x86_64: kernel-2.6.9-67.0.4.EL.x86_64.rpm kernel-devel-2.6.9-67.0.4.EL.x86_64.rpm kernel-doc-2.6.9-67.0.4.EL.noarch.rpm kernel-largesmp-2.6.9-67.0.4.EL.x86_64.rpm kernel-largesmp-devel-2.6.9-67.0.4.EL.x86_64.rpm kernel-smp-2.6.9-67.0.4.EL.x86_64.rpm kernel-smp-devel-2.6.9-67.0.4.EL.x86_64.rpm kernel-xenU-2.6.9-67.0.4.EL.x86_64.rpm kernel-xenU-devel-2.6.9-67.0.4.EL.x86_64.rpm src: kernel-2.6.9-67.0.4.EL.src.rpm

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Strange gpg problem
by Anne Wilson 05 Feb '08

05 Feb '08

When I read a message signed by a gpg key that is not already on my keyring I have runaway cpu usage. To end it I have to 'killall gpg' - at which the display returns, but of course it has not connected with the keyserver, so the key is not downloaded and I get a 'signature not verified' error message.. What's more, although the display has returned, I have to 'killall gpg' a second time, to return cpu usage to normal. I'm at a loss where to start troubleshooting this. Could it be a firewall problem? Anne

1 0

Need help in analyzing ntop data
by ankush grover 05 Feb '08

05 Feb '08

Hi, I want to do some analysis of NTOP data. Currently I have installed NTOP on Centos 5.1 and I am able to see some network data being graphed. But there is no documentation given whether NTOP is showing Network Throughput in MBytes or MBits for ex I am getting Throughput Min: 163.7k , Max: 3.0 M and Last 859.4k and there are some options like anomalia, upper,lower and trend (30min). Under All Protocols -> Traffic I can see per hour data received and data sent but I am not able to figure out how NTOP is currently the percentage of this data Time Tot. Traffic Sent %Traffic Sent Tot. Traffic Rcvd % Traffic Rcvd 10 AM 287.8 MBytes 0.3% 32.9 MBytes 1.4 % How NTOP is calculating %Traffic Sent /Rcvd? Please let me know if you need any further inputs . Regards Ankush

1 0

tail command
by Scott McClanahan 05 Feb '08

05 Feb '08

In centos 4 we used tail in the following way: tail +83 file That would tail the contents of the file starting at line 83. In centos 5 that same command complains about the file +83 not being found. It appears that the + option in tail doesn't work the same way in centos 5. Is there another easy way to grab the contents of a file starting at a certain line number and beyond.

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