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Running Asterisk & Freepbx on readonly Root (Stateless System)
by Alok Prasad 14 Jan '10

14 Jan '10

Hi I am trying to Run AsteriskNow 1.5 which uses Centos 5.3 Distribution with Readonly Root Filesytem. Right now if I shutdown the system abrupty or there is power failure linux kernel doesn't not boot "Kernel panic" and other short of issues.prb due to corrupted files. Thats why i want to make root filesystem as read-only and placing some directories /var and /etc/asterisk etc as read/write in fstab so above problem doesn't exists. Centos Provides fantastic experimental technolyg with only a single line configuration to root read-only and make it boot /etc/sysconfig/readonly-root file Edting /etc/sysconfig/readonly-root -> change READONLY=no to READONLY=yes * * I tried but i am not able to run asterisk and freepbx.Linux system boots up properly. Any one has ever tried this ..Any suggestion how to proceed with. Thx *Alok* * *

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CentOS 5.4 32-bit vs. 64-bit strange mystery WRT PXEBoot
by Robert Heller 13 Jan '10

13 Jan '10

I am in the process of migrating my desktop system from 32-bit CentOS 4.8 to 64-bit CentOS 5.4. One of the things I want to be able to do is boot my IBM Thinkpad X25 laptop via its PXEBoot ROM over the LAN (it has a hard disk and boot locally just fine, I just want a way to boot it for rescue and/or new O/S installs). On my 32-bit CentOS 4.8 this works just fine. It also works on another machine, running 32-bit CentOS 5.4. On my desktop system running the 64-bit version of CentOS 5.4 it does not. The DHCP part works fine, but I get a 'TFTP ARP TIMEOUT' message. The various config files are all the same (or consistent). I cannot figure out what is wrong. If I let the laptop boot up normally, it is happy to use tftp to fetch pxelinux.0 from the 64-bit CentOS 5.4 system. It just won't fetch it from the boot ROM. What am I missing here? -- Robert Heller -- 978-544-6933 Deepwoods Software -- Download the Model Railroad System http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows heller(a)deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/

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Re: [CentOS] CentOS Digest, Vol 60, Issue 13
by Emanuel Machado 13 Jan '10

13 Jan '10

Another issue to consider with SSDs is that they are based on Flash technology. Each flash cell can only be written on about 10,000 to 100,000 times or so (*), so if you're using extensive read/write on your server you will be impacted. SSD manufacturers go around this issue by giving some intelligence to the drive controllers, so that they minimize the per-cell usage (which means moving things around a bit internally, transparently to you), so in many cases you will not see any impact. However, I would be careful on what I run on it, and what services are enabled, maybe having another disk around for write intensive apps. Emanuel (*) http://en.wikipedia.org/wiki/Solid-state_drive#Disadvantages ---- Emanuel Machado, PhD. Senior Engineer, Project Leader Cytonome/ST, LLC. 27 Drydock Ave Boston, MA 02210 Voice: (617) 330-5030 ext. 237 Fax: (617) 330-5031 Website: www.cytonomest.com Email: emachado(a)cytonomest.com  Please consider the environment before printing this email. -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of centos-request(a)centos.org Sent: Wednesday, January 13, 2010 12:00 PM To: centos(a)centos.org Subject: CentOS Digest, Vol 60, Issue 13 Send CentOS mailing list submissions to centos(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos or, via email, send a message with subject or body 'help' to centos-request(a)centos.org You can reach the person managing the list at centos-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS digest..."

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New selinux-policy breaks logwatch emails?
by James Rankin 13 Jan '10

13 Jan '10

Hello, After a yum update last night, I had a CenOS 5.4 i386 system pull in the following selinux updates: Jan 07 21:39:14 Updated: selinux-policy-2.4.6-255.el5_4.3.noarch Jan 07 21:39:31 Updated: selinux-policy-targeted-2.4.6-255.el5_4.3.noarch This machine has SELinux set to Enforcing. This morning, I see I got the following email from Cron: /etc/cron.daily/0logwatch: sendmail: warning: premature end-of-input on /usr/sbin/postdrop -r while reading input attribute name sendmail: fatal: root(0): unable to execute /usr/sbin/postdrop -r: Success Frankly, this error message means little to mean... in the course of troubleshooting, I tried this: # setenforce Permissive # /etc/cron.daily/0logwatch And it worked! The logwatch email sends without error. If I turn SELinux back to Enforcing, then the email error is consistently repeated. What confuses me is that, when SElinux enforcing causes this error to occur, no SELinux or AVC messages appear in /var/log/messages or /vaar/log/secure or /var/log/audit/audit.log. Has anyone else seen this? Any suggestions would be appreciated. Thanks!

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kickstart config file for LiveCD
by ken 13 Jan '10

13 Jan '10

Going through the steps for putting a LiveCD on a USB stick, I'm reading the docs and one is a bit ambiguous on one point: <https://projects.centos.org/trac/livecd/wiki/GetToolset> says: "The LiveCD creation process requires a kickstart configuration file." But two lines above that, is says the kickstart config file is optional. I've created a couple LiveCDs in the past (never on a USB stick though) and never needed a kickstart configuration file. Also, the same doc points to two different ones without explaining much about each. Perhaps here I should mention that my ultimate goal here is to take the USB stick into a computer store, boot up various laptops with it to see which ones have Linux-compatible hardware. So there's two issues here really-- at least. Any help, clarification, explanation would be much appreciated. -- Without music, life would be a mistake. --Friedrich Nietzsche

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CentOS-announce Digest, Vol 59, Issue 4
by centos-announce-request＠centos.org 13 Jan '10

13 Jan '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. CEBA-2010:0027 CentOS 5 x86_64 tcsh Update (Karanbir Singh) 2. CEBA-2010:0027 CentOS 5 i386 tcsh Update (Karanbir Singh) 3. CESA-2010:0029 Critical CentOS 5 i386 krb5 Update (Karanbir Singh) 4. CESA-2010:0029 Critical CentOS 5 x86_64 krb5 Update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Wed, 13 Jan 2010 00:48:25 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2010:0027 CentOS 5 x86_64 tcsh Update To: centos-announce(a)centos.org Message-ID: <20100113004825.GA6736(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2010:0027 Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0027.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: 7ee39a3070dd845138fdace1b9e89ed8 tcsh-6.14-14.el5_4.3.x86_64.rpm Source: a90966f75e94802a0f0755696aa7a264 tcsh-6.14-14.el5_4.3.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Wed, 13 Jan 2010 00:48:25 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2010:0027 CentOS 5 i386 tcsh Update To: centos-announce(a)centos.org Message-ID: <20100113004825.GA6722(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2010:0027 Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0027.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: 323e91d8cf692bd8ce99a0aa81f65204 tcsh-6.14-14.el5_4.3.i386.rpm Source: a90966f75e94802a0f0755696aa7a264 tcsh-6.14-14.el5_4.3.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Wed, 13 Jan 2010 00:51:06 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0029 Critical CentOS 5 i386 krb5 Update To: centos-announce(a)centos.org Message-ID: <20100113005106.GA6827(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0029 Critical Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0029.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: 2a78f46a51c0f444697172fb8364a001 krb5-devel-1.6.1-36.el5_4.1.i386.rpm 089ceaf08e474b8d32348cbd9d2ad5c3 krb5-libs-1.6.1-36.el5_4.1.i386.rpm 10f74467fb4b34ae39f5f830111a8f0a krb5-server-1.6.1-36.el5_4.1.i386.rpm 617bef8d74b9b64d3398ea7a85cfe8d6 krb5-workstation-1.6.1-36.el5_4.1.i386.rpm Source: 17d6d25bbeffabab23b45c629277ac05 krb5-1.6.1-36.el5_4.1.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Wed, 13 Jan 2010 00:51:06 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0029 Critical CentOS 5 x86_64 krb5 Update To: centos-announce(a)centos.org Message-ID: <20100113005106.GA6840(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0029 Critical Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0029.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: f2195d76f6b1f2b12f6a8a930cd00aef krb5-devel-1.6.1-36.el5_4.1.i386.rpm 1bf2b2a3b52978b0833a1813b0382079 krb5-devel-1.6.1-36.el5_4.1.x86_64.rpm 8b305659f173c6578dab4f6dbc975cab krb5-libs-1.6.1-36.el5_4.1.i386.rpm 2dcf7c1d7c7b453b97b285a9936ae5d4 krb5-libs-1.6.1-36.el5_4.1.x86_64.rpm 5a602ed6711f7218b38dc5afeab52b70 krb5-server-1.6.1-36.el5_4.1.x86_64.rpm 324352cdf8abe1b6f631bc62ea2bca11 krb5-workstation-1.6.1-36.el5_4.1.x86_64.rpm Source: 17d6d25bbeffabab23b45c629277ac05 krb5-1.6.1-36.el5_4.1.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 59, Issue 4 **********************************************

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Setup multiple bridges for use with KVM
by Jacob Hydeman 13 Jan '10

13 Jan '10

Running CentOS 5.4 x64. Have successfully bridged eth2 with br2 by following the instructions here: http://wiki.libvirt.org/page/Networking (under the RHEL section) Have been running several KVM VMs successfully via this bridge. I am now trying to bridge additional interfaces by using the same routine. Each bridge is named to correspond with the ethX device its bridged with. Example of ifcfg-eth0 script: DEVICE=eth0 HWADDR=00:16:76:D6:C9:45 ONBOOT=yes BRIDGE=br0 then of ifcfg-br0 script: DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes DELAY=0 This is repeated 3 times for eth0-eth2 and br0-br2. I've read somewhere that STP needs to be enabled when using multiple bridges. I've tried adding STP=on to the ifcfg-brX scripts but with the same result. Yes, brctl shows that STP is on. The original bridge eth2-br2 continues to work but I can't get any traffic across any other bridge. Either by dhcp or static ips. Is multiple bridges a possibility? Previous to moving to KVM I was running Xen Server on the same hardware. I am just trying to recreate the network setup I had. I believe Xen Server runs on top of a linux platform so such a thing should be possible. Thanks, Jacob

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Re: [CentOS] Backup server
by Max Hetrick 13 Jan '10

13 Jan '10

Sorin Srbu wrote: > Somewhat similar, thanks. I think however I need to get away from this sort > of backups. They're just to space-consuming. Check out the user submitted HowTos on the Wiki. http://wiki.centos.org/HowTos#head-bab8e87dc82e722540e2d39de8408750004a8c4a Regards, Max

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mapping sar -d devices to mount points
by Blackburn, Marvin 13 Jan '10

13 Jan '10

Sar -d reports devices like dev253-0. How can I map these to a mount point? I use a mixture of lvm with ext3 filesytems, plain ext3 filesystems on local storage, and ext3 filesystems on powerpath devices. Any help would be appreciated. _____________________________________ "He's no failure. He's not dead yet." William Lloyd George

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Re: [CentOS] Backup server
by Brett Serkez 13 Jan '10

13 Jan '10

On Wed, Jan 13, 2010 at 5:04 AM, Sorin Srbu <sorin.srbu(a)orgfarm.uu.se> wrote: <snip> > The way we currently do backups is to use rsync from the clients to two > folders on an older server that rolls over every other week. This worked fine > for a while, but the rsync is cumulative and the users generate a tremendous > amount of data... <snip> You might want to check out the rsync switches --backup-dir and --suffix. Using them some thing like this: --delete --backup --backup-dir=$MIRROR_DIR/RsyncBckups --suffix=".$DATE" allows you to keep an exact duplication of the original directory and keeping the original files that were either deleted or overwritten in a seperate backup directory with dated suffixes, which can be archived on some regular basis. This should allow you to keep the simplicity of rsync and control the cumulative size. Brett

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