Discuss September 2008

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264 participants
315 discussions

How to create a virtual bonded interface?
by John Horne 18 Sep '08

18 Sep '08

Hello, I have a server with 4 NICS running CentOS 5.2. I have bonded the interfaces together such that 'bond0' consists of eth0-3. This is not a problem, and works fine. However, I now need to create a virtual interface. In a non-bonded server I would just create something like eth0:1, but with a bonded interface I am a bit confused. I have created bond0:1 simple by copying the /etc/sysconfig/network-scripts/ifcfg-bond0 file, calling it 'bond0:1' and setting the DEVICE appropriately. Then I ran 'ifup bond0:1'. The interface came up, and seems to be working okay. I have not tested yet if the bonding failover works with bond0:1 because I am doing this remotely at the moment. Tomorrow I should be able to test that. My question is, is creating a virtual bonded interface that simple or have I missed something? Have I done this the right way, or should I instead have created a second bonded interface ('bond1') and made it consist of eth0:1, eth1:1, eth2:1 and eth3:1? Admittedly this would have involved about 8 or so interfaces in total for the server! Secondly, I added nothing to the /etc/modprobe.conf file. Should I have added anything like 'alias bond0:1 bonding'? I also did not add any static routes, yet if I use 'ping' to send packets out through the virtual IP address ping says it is doing so (so again it all seems to be working). My concern is that while it seems to be fine at the moment, and even after rebooting, I may have missed something that will cause it to fail at some point. For info, 'ifconfig' output shows: ============================================================= bond0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx inet addr:141.163.yy.a Bcast:141.163.yy.yy Mask:255.255.255.224 inet6 addr: abcd::abcd:abcd:abcd:abcd/64 Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:88468 errors:0 dropped:0 overruns:0 frame:0 TX packets:59486 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:80654540 (76.9 MiB) TX bytes:5847688 (5.5 MiB) bond0:1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx inet addr:141.163.yy.b Bcast:141.163.yy.yy Mask:255.255.255.224 UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 ============================================================= The 'netstat -rn' output shows: ============================================================= Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 141.163.yy.0 0.0.0.0 255.255.255.224 U 0 0 0 bond0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 bond0 0.0.0.0 141.163.yy.30 0.0.0.0 UG 0 0 0 bond0 ============================================================= Shouldn't 'bond0:1' appear there somewhere? Anyone notice if I missed anything? Thanks, John. -- --------------------------------------------------------------- John Horne, University of Plymouth, UK Tel: +44 (0)1752 587287 E-mail: John.Horne(a)plymouth.ac.uk Fax: +44 (0)1752 587001

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USB DVD drive disappearing during kickstart install.
by Alex Tang 18 Sep '08

18 Sep '08

Hi folks. I maintain a bunch of centos based machines that are built using a somewhat stripped down (limited number but mainly stock rpms) centos distro. The installation process is plain anaconda stuff with a kickstart file on the root of the DVD/iso. The current hardware and media i'm using is DVD based. On machines that have internal DVD drives (all IDE CD/DVD drives), everything is fine. However, I'm having a problem that started in 4.6 and continues in 4.7 on machines that don't have an internal DVD drive and therefore i must use a USB DVD drive. On these machines, everything goes ok in the beginning. The DVD is "seen" by the machine and boots fine, the isolinux screen comes up and i let the timeout go or i hit return to continue. Then, almost immediately thereafter, (when i should see the blue screen with text about loading drivers) i see the blue screen with the prompt for language. This is supposed to be a kickstart install, so at this point i know i'm hosed. If I use alt-f3 or alt-f4 (can't remember which one), i can see an error message saying that the usb-storage driver is loaded, but it cannot find any USB storage devices to read from. If i alt-f1 back to the main blue screen with the language prompt, i can go through the prompts for language, keyboard, however when i get to "install type", and select "usb cdrom" (i can't remember the text exactly...the machines are in the server room, and i'm at my desk ATM), it fails again. I can alt-f3 back to see that the same error about loading the usb-storage driver was successful but it can't find any attached usb storage device. Unfortunately, at this point, there's no shell yet available in alt-f2, so i can't poke around much). It seems like somehow, something is happening like the USB bus is being reset and it's "loosing" the usb devices and they can't be found anymore. Note that the original boot occurred of the DVD drive (i got past the isolinux screen), so it's at least working in the beginning to get that far. I had seen this problem occur a handful of times in the past in my same distro based on CentOS-4.5, however it was sporadic and was usually solved by changing the manufacturer of DVD drive (i thought it was a hardware vendor not implementing the USB spec properly since most devices worked...only a handful didn't). However, since moving to 4.6 and also in 4.7, this problem is completely repeatable with all USB DVD drives i have (granted it's only 3 different vendors/models, but they all don't work, whereas all 3 of these used to work in the 4.5 based distro). Also, as i stated earlier, on machines with internal DVD drives (IDE based), everything works fine. Has anyone seen anything like this? Do you have any suggestions to try? One thing i'm going to try is downloading the stock 4.7 DVD ISO and see if it fails. The download is taking a while, so i won't be able to report back on that test until tomorrow. Oh yeah, the machines i'm using that are having this problem are a Dell R200, Supermicro PDSMi, and Supermicro P4SC8. I don't have the DVD drive mfg and model numbers handy, i'll get those as well. Any help would be greatly appreciated. Thanks. ...alex...

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email and MS outlook
by Mag Gam 18 Sep '08

18 Sep '08

We use Microsoft Outlook heavy at school but our backed is CentOS. I use echo "Foo" | mail -s "subject" addr(a)unc.edu a lot. Is it possible to change the priority to High so Outlook will understand it? The priority meaning the email will be sent to the normal email queue but on Outlook it would have the exclamation point. TIA

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virt-install -L
by David Dyer-Bennet 18 Sep '08

18 Sep '08

So what does the "location" one gives virt-install point to? Ideally, what directory on the Centos 5.2 DVD should it point to? Or should it point to the ISO image? Or what? I'm getting tired of trying things at random, and the documentation really doesn't tell me anything beyond that it should be a directory (because it says two different files should be there). -- David Dyer-Bennet, dd-b(a)dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info

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Re: [CentOS] cron job not working
by Al Sparks 18 Sep '08

18 Sep '08

> Probably a permissions problem, as has been noted. What I can't > understand is how the problem came to be so complicated. This, > run as a root cron job, will produce the desired directory: > > #!/bin/bash > mkdir -p /ora-local/db-test-backups/`date +%Y"_"%m"_"%d` > > ...without the adjustments in the perl script. AAMOF, it's even > simpler if you can tolerate hyphen separators rather than > underscores. (date +%F) I'll give that a shot. Note that I have not been running this as root (though crond is running as root). Most of the time, if it's a permissions problem, crond will send an email telling me it's a permissions problem. === Al

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Missing 4.7 kernel update SRPMs ?
by James Pearson 18 Sep '08

18 Sep '08

I can't find the kernel-2.6.9-78.0.1.EL.src.rpm and kernel-2.6.9-78.0.1.plus.c4.src.rpm on the download sites - the binary i386/x86_64 RPMS are there, but not the matching SRPMs Does anyone know where they are? Thanks James Pearson

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CentOS on Eee PC 1000H
by Sven 18 Sep '08

18 Sep '08

Hi folks Anybody running CentOS on Eee PC 1000H? In CentOS wiki[0] there is a draft about Eee PC 900 from Fabian Arrotin. Does the same howto work for Eee PC 1000H? So far he writes: > Waiting for an official way to host the necessary rpms ... Where to download WiFi and NIC driver? regards Sven [0] http://wiki.centos.org/HowTos/Laptops/Asus/Eeepc

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slow Perl on CentOS 5
by Florin Andrei 18 Sep '08

18 Sep '08

If your Perl apps are unusually slow on CentOS 5, have a look at this blog: http://blog.vipul.net/2008/08/24/redhat-perl-what-a-tragedy/ In a nutshell: some Perl apps are 100x slower on RedHat / CentOS 5 compared to other distributions. Bugzilla entry: https://bugzilla.redhat.com/show_bug.cgi?id=379791 -- Florin Andrei http://florin.myip.org/

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CentOS-announce Digest, Vol 43, Issue 7
by centos-announce-request＠centos.org 18 Sep '08

18 Sep '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. CEBA-2008:0876 CentOS 5 i386 perl Update (Karanbir Singh) 2. CEBA-2008:0876 CentOS 5 x86_64 perl Update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Thu, 18 Sep 2008 01:42:27 +0100 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2008:0876 CentOS 5 i386 perl Update To: centos-announce(a)centos.org Message-ID: <20080918004227.GA29408(a)base.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2008:0876 Upstream details at : https://rhn.redhat.com/errata/RHBA-2008-0876.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: d238a0ae697c6e9d131b8949a39a5f79 perl-5.8.8-15.el5_2.1.i386.rpm d977b3a4aa388a08d44c67f133e449b4 perl-suidperl-5.8.8-15.el5_2.1.i386.rpm Source: eb29d8941819dd64a0d8a8edb2c2f1b2 perl-5.8.8-15.el5_2.1.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Thu, 18 Sep 2008 01:42:27 +0100 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2008:0876 CentOS 5 x86_64 perl Update To: centos-announce(a)centos.org Message-ID: <20080918004227.GA29421(a)base.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2008:0876 Upstream details at : https://rhn.redhat.com/errata/RHBA-2008-0876.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: 30991c5c1d5616372116a0480f8bdfd7 perl-5.8.8-15.el5_2.1.i386.rpm e8965ee3f34823896e4b9ec4b54ff01f perl-5.8.8-15.el5_2.1.x86_64.rpm 3ff4aaa5878811d651c40dcea3a198c1 perl-suidperl-5.8.8-15.el5_2.1.x86_64.rpm Source: eb29d8941819dd64a0d8a8edb2c2f1b2 perl-5.8.8-15.el5_2.1.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 43, Issue 7 **********************************************

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Need help with Wine
by Sadaruwan Samaraweera 18 Sep '08

18 Sep '08

Hi, I've two questions, 1. Is it OK to use wine on CentOS 5.2 x86_64 ? 2. If it's OK then is there a possibility that virus's that infect windows based system to attack my CentOS or any other Linux system thats running Wine? Please help me. Thank you -- Sadaruwan Samaraweera

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Discuss September 2008