Discuss September 2010

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225 participants
167 discussions

Amazon AMI based on CentOS 5?
by Mathieu Baudier 17 Sep '10

17 Sep '10

Hello, Amazon has just released a custom Linux distribution (Amazon Linux AMI) for use in their EC2 cloud: http://aws.amazon.com/ec2/faqs/#What_is_the_Amazon_Linux_AMI Out of curiosity, I googled a bit around it and read in various places (e.g. [1] and [2]) that it is based on CentOS 5 (basically a stripped down version) and should be compatible with most packages. Do any of you have confirmation of this? And more details/experience? (I'm not a EC2 user, so I cannot check by myself...) Thanks, Mathieu [1] http://www.cloudave.com/4872/open-source-and-cloud-computing-the-amazon-lin… [2] http://news.ycombinator.com/item?id=1693055

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Bandwidth limit per user or ip
by Damas Ally 17 Sep '10

17 Sep '10

Greetings all, I would like to set the use of bandwidth in my network per user or ip address, is it possible using my linux box running Centos 5.1? regards, Damas -- "If opportunity doesn't knock, build a door". Says, Makweba Sir

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xen domU crash
by Valentin Radu 17 Sep '10

17 Sep '10

Hello all, >From time to time (more often lately) all xen guests crash with all process to 9999% CPU load. All VM running with Fedora 8 OS (PV VM). On host (dual socket Xeon Nocona R0 3GHz) run CentOS x86_64 with hypervisor Xen 3.4.0 Have some similar experiences? Any ideas?

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Firefox spelling checker
by Frank Cox 17 Sep '10

17 Sep '10

I just noticed that since the last updates, Firefox no longer does the automatic spelling checking thing in text boxes. I'm sure that it used to work and I'm not sure exactly when it stopped. I just tried it on two different up-to-date Centos 5 machines with the same results. "Check my spelling as I type" is set. -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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Can anyone suggest a decent backup system?
by Kevin Thorpe 16 Sep '10

16 Sep '10

Hi all, We have a bit of a problem with backups. We've been using bacula to tape and now trying to disk but it's a complete nightmare as regards tape management. The backup to file storage went ok for ages and now is stuck 'waiting for max storage jobs' which is odd as that's set to 20 and it's the only backup running. That's totally typical of bacula. Can anyone suggest a simple backup package for us? Essentially a single server, full backup to tape every day. We don't need tape management as we're fully capable of reading the written label on the tape ourselves.

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is Intel VT-d "really" necessary?
by Rudi Ahlers 16 Sep '10

16 Sep '10

Hi all, I'm just curios and would like some input from the community on this one. We're busy budgeting for a couple of new servers and I thought it would be good to try out the Core i7 CPU's, but see the majority of them don't offer VT-d, but just VT-x. Looking at the LGA1366 range, only the "Intel lga1366 i7 980XE" (from the list of what our suppliers stock) have VT-d, and it costs 4x more than "Intel lga1366 i7 930" or 2x more than "Intel lga1366 i7 960". From a budget perspecitve I could purchase 4 more CPU's, which could translate to 40x - 80x more VM's being hosted for the same capital outlay. Experience has shown that we under-utilize CPU's by a great margin and memory / HDD IO is our biggest bottleneck on any server. So, if VT-d really necessary? We mainly host XEN virtual machine for the hosting industry, i.e. we don't need / use graphics rendering inside VM's, or need DAS on the VM's, etc. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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https
by Jerry Geis 16 Sep '10

16 Sep '10

hi all, I wish to just have secure browsing for my application. no credit cards or anything like that just secure browser usage is the goal. I can self sign a certificate (I already have) on my servers but for "anyone" accessing the server you see this "nasty" message about "untrusted sight " and all that. This will all be intranet type usage for the server. What is the best method to not see that "untrusted sight" and have the certificate load without and exception? jerry

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CentOS-announce Digest, Vol 67, Issue 4
by centos-announce-request＠centos.org 16 Sep '10

16 Sep '10

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-2010:0697 Critical CentOS 3 i386 samba - security and bug fix update (Tru Huynh) 2. CESA-2010:0697 Critical CentOS 3 x86_64 samba - security and bug fix update (Tru Huynh) 3. CESA-2010:0697 Critical CentOS 4 i386 samba - security and bug fix update (Tru Huynh) 4. CESA-2010:0697 Critical CentOS 4 x86_64 samba - security and bug fix update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Wed, 15 Sep 2010 15:23:12 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2010:0697 Critical CentOS 3 i386 samba - security and bug fix update To: centos-announce(a)centos.org Message-ID: <20100915132312.GA2862(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2010:0697 samba security update for CentOS 3 i386: https://rhn.redhat.com/errata/RHSA-2010-0697.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/samba-3.0.9-1.3E.18.i386.rpm updates/i386/RPMS/samba-client-3.0.9-1.3E.18.i386.rpm updates/i386/RPMS/samba-common-3.0.9-1.3E.18.i386.rpm updates/i386/RPMS/samba-swat-3.0.9-1.3E.18.i386.rpm source: updates/SRPMS/samba-3.0.9-1.3E.18.src.rpm You may update your CentOS-3 i386 installations by running the command: yum update samba Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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how to show that a filesystem is ACL-enabled?
by Robert P. J. Day 16 Sep '10

16 Sep '10

currently reading the RHEL deployment guide and i have a short question about ACLs that i can test on my centos 5.5 box. here: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Deploymen… the manual clearly claims that, in order to use ACLs on a filesystem, that filesystem must be mounted with the "acl" mount option, and even shows a sample /etc/fstab entry that represents that. however, i just verified that i can use setfacl to give my non-root account read access to /etc/shadow so, clearly(?), the root filesystem supports ACLs, but the mount entry for that filesystem in /etc/fstab reads only "defaults" and, as i read it in the man page for "mount", the "defaults" option is not listed as including the "acl" option. can someone clarify this? is there a command that shows whether a filesystem is currently acl-enabled? and is the mount man page simply incomplete in that respect? thanks. rday -- ======================================================================== Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ========================================================================

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Re: [CentOS] Can anyone suggest a decent backup system?
by Les Mikesell 16 Sep '10

16 Sep '10

On 9/16/10 6:20 AM, Sorin Srbu wrote: >> -----Original Message----- >> From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On > Behalf >> Of Kevin Thorpe >> Sent: Thursday, September 16, 2010 11:59 AM >> To: CentOS mailing list >> Subject: Re: [CentOS] Can anyone suggest a decent backup system? >> >> I'll definitely look into BackupPC for HDD backups but they're in the >> same offfice and >> don't give us the audit monthend tapes we are required to keep > indefinitely. > > Given you have enough storage space, it's possible to keep a full backup > with BackupPC indefinitely as well, *if* you set up the rentention > parameters properly. I ran amanda and backuppc independently for a long time. Both are pretty much 'full automatic' once you set them up. If your backup window is long enough having both means you still have backups if one or the other has some kind of problem or is being upgraded. But, after years of never restoring from tapes I gave up on them and now have the backuppc archive on a 3-member raid1 mirror and swap one of the drives offsite regularly. Tapes are kind of an afterthought with backuppc, but if you want to use it by itself you can use its concept of 'archive host' to write a tar copy of the last backup to tape (or compress/split for dvds, etc.). This can be done through the web interface or you could use the command line tool that generates a tar image to script whatever you wanted to write to tape. With the command line tool you can specify the backup you want so you'd be able to generate a 'month-end' tar any time before the run for that day expired. Also, backuppc can use rsync over ssh for the transport, so once you get the initial copy you might be able to move the server to a remote location. -- Les Mikesell lesmikesell(a)gmail.com

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Discuss September 2010