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34752 discussions

yum repository conflict resolutions
by Dave 11 Apr '06

11 Apr '06

Hello, I'm setting up a test mailserver on centos4. I want to use stable rpm packages but ones that don't have conflicting lib requirements. I've got the standard yum configuration with one excdeption i've enabled the centosplus yum repository. I've read that dag's repository has a package i'm going to need courier so i figured to set that up. Here's my problem, if i then do a yum update on this box and more than one repository has a package say kernel which does it get? Or, if a package has a library dependency and that is installed and it conflicts with another, how would this be resolved? Sorry about the confusion any help appreciated. I'm also going to possibly have a need to roll out custom-made rpms not sure yet on that one, and it's been a while since i did them, rh7 i think was the last time. Does anyone have a Centos-specific howto on this not for modifying an existing srpm, but for creating an rpm from tarball? Thanks. Dave.

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CentOS-announce Digest, Vol 14, Issue 4
by centos-announce-request＠centos.org 11 Apr '06

11 Apr '06

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. CentOS 3.7 is released (Lance Davis) ---------------------------------------------------------------------- Message: 1 Date: Mon, 10 Apr 2006 13:15:20 +0100 From: Lance Davis <lance(a)uklinux.net> Subject: [CentOS-announce] CentOS 3.7 is released To: centos-announce(a)centos.org Message-ID: <1144671320.20897.9.camel@router> Content-Type: text/plain; charset="us-ascii" The CentOS development team are please to announce the release of CentOS 3.7 for all supported architectures. It is available on all mirrors and via bitorrent. This release corresponds to the upstream vendor U7 release together with updates through April 3rd (depending on architecture). Lance

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redirecting some addresses with sendmail
by Tony 11 Apr '06

11 Apr '06

I have a fully working cyrus+sendmail mail server hosting all users for foo.com. Company foo has been acquired by company bar and it has been decided that bar.com is the new domain of choice. The administrator of bar.com has added a pile of redirects to send various user(a)bar.com addresses so they come up to my server at foo.com. My users have changed their From: addresses to user(a)bar.com and we have a basic working system. However, if one user in former company foo mails another user in the same office their mail now goes offsite to bar.com's mail server and is then redirected back in again, which works but is bad for bandwidth. Ideally I'd like to teach sendmail that a subset of bar.com users are now local. However if I try this in the /etc/aliases file, I get the warning "cannot alias non-local names". Has anyone got any better ideas how to do this- or a better suggestion as to where I should ask this question again? -- Cheers, Tony

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question about mouse and kvm switch
by mrrs 11 Apr '06

11 Apr '06

Greetings all: I have a CentOS 3.6 and 4.3 box sharing a kvm switch. Switching from the 4.3 box to the 3.6 and back again, the mouse stops responding. The keyboard works just fine, and I can ssh into the box. I have tried <ctl><alt><bksp> and while it does restart the x server, it doesn't seem to affect the mouse. Is there something I can run to get the mouse recognized again short of restarting the computer? thanks markus __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Best Partitioning Tool?
by Mark Sargent 11 Apr '06

11 Apr '06

Hi All, which is the best tool for partitioning, as I forgot to bring in my copy of PartitionMagic(DOH!!) and need to resize an NTFS partition today. I'm using XP Pro at the moment. I wish to resize a 38GB partition, primary, to 20GB and use the rest for a Linux Install(CentOS 4-3). Cheers. Mark Sargent. P.S. I can't use my normal account whilst at work, so subscribed from my work account. Is that breaking any list rule, and if so, what's the work around?

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athlon64/opteron 8GB per CPU
by David Thompson 10 Apr '06

10 Apr '06

I'm putting together a spec for a big(ger) memory x86_64 host, and I hope some of you-all can help. I'm looking for success stories of hardware that folks are using in production environments, preferably with CentOS 4, with more than 4GB of memory per CPU. I know there are lots of mobos out there that can do this, but I'm looking for what folks really have running. Call me paranoid. The target is SATA + n*GigE + 1CPU + 8GB memory, and I can consider other configurations. The incumbent system is a Xeon 8GB system running i686 CentOS 4.3 (what else?), with light CPU loading and very heavy IO loading (WD raptors are our friends). Folks with deep(er) knowledge of x86_64 architecture, I'd also be interested in the trade offs between 1CPU w/8GB and 2CPUs each with 4GB. (E.g. what's the real cost of shipping data back and forth between the memory spaces of the two CPUs? How does the 2.6 kernel deal with the split memory space? etc...) The memory is all going to be used up in kernel buffers keeping bits of files in kernel memory. Also, trade offs between Opteron and Xeon architectures, i686 vs. x86_64, bounce buffers, etc., for an application like this would be helpful. The application is enhancement to a mirror server (mirror.cs.wisc.edu) here at UW-Madison. Many thanks to all in advance. Private or public replies welcome. Dave Thompson UW-Madison

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Re: [CentOS] athlon64/opteron 8GB per CPU
by David Thompson 10 Apr '06

10 Apr '06

Jay Lee wrote: > >Why i686? Sure the i386 version of CentOS 4 can access >4gb ram but >it's quite ugly how it has to do it and there are still some limits. >I'd strongly recommend using the x86_64 release if you can pull it off. It's an older Xeon that doesn't have the EMT64 extensions. >Well, if all you're doing is rsync or similar than CPU really isn't >going to be a bottleneck in the near term, bandwidth and I/O are the >bigger bottlenecks. What speed will the network be running at? The traffic is rsync (out; we have another box that grabs content for us), http, and ftp. It's all GigE locally, and BIG pipes to the internet. Before linux distros exploded in size and number, we pushed several hundred gigabit for several days when someone did a release. Dave

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Re: [CentOS] athlon64/opteron 8GB per CPU
by David Thompson 10 Apr '06

10 Apr '06

Joshua Baker-LePain wrote: >On Mon, 10 Apr 2006 at 2:28pm, David Thompson wrote > >I have several Opteron/8GB RAM systems, all running centos-4/x86_64. The >older ones are on Arima HDAMA motherboards, and the newer ones are on >Supermicro H8DAR-T boards. They're very nice systems. Yeah, what's up with SuperMicro and Opteron systems? Looking at their web site, it's like they have disavowed any knowledge of having built anything Opteron. Did they back out of Opteron, or do you have to be a member of a secret society to get to their information? >One caveat with these Supermicro boards is the the onboard SATA (some >sort of Adapted branded Marvell thingy) isn't supported. They offer some >sort of binary download, but we all know how much fun that is. I just put >2 port 3wares in 'em all (they're cluster compute nodes). Sure, it's >expensive for a simple SATA controller. But it's also no fuss and rock >solid. The newer SM boards have HT2000/HT1000 based SATA which centos 4.3 >should support, but I've no experience with 'em. Yeah, I've been there also. We also use alot of threeware in these applications. The other add-in sata that I've used in 3112, but that hasn't always worked. >I don't know how deep my knowledge is, but we run a lot of memory >intensive code on these nodes and get a 2X speedup with dual CPUs. So, >IME, there's not much penalty with the extra hops to get to the other >CPU's memory. Yeah, it's cheaper to buy two CPUs and use 1GB dimms (8 slots) compared to 1 CPU and 2GB dimms (4 slots). But the CPUs aren't going to be loaded (at all), so I'm concerned of hurting throughput by splitting the memory space. Tyan is working on a mobo with 8 slots per CPU (S3892), but my favorite vendors aren't carrying it (yet). Dave

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P3Scan support
by Jens Abraham 10 Apr '06

10 Apr '06

Hello, I want to ask if CentOS will support P3Scan (http://p3scan.sourceforge.net/) as RPM delivered with the distribution? For explanation: P3Scan is an transparent mailproxy. It uses ClamAV and SpamAssassin to distinguish between Spam- Virus- and normal Mail. Its more usefull to get an update via the repos instead of compiling it by myself. I hope you understand my englisch. ;) Greets Jens -- http://core.pnode.de/wordpress/ - Core Blog (offline) "Bis zum Meer für einen Bruder, durch das Meer für eine Geliebte" -Bulgarisches Sprichwort Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl

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Network and default route
by Scott Silva 10 Apr '06

10 Apr '06

I have had this problem on and off since RedHat 6, and I always worked through it, but I thought I would ask. When you have multiple network interfaces, how does the system determine the default route? Or is it the first, (or last) interface that comes up? On the problem systems I have to add a "route add default..." statement in some systems in the rc.local to get them to work right. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!!

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