Discuss October 2008

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298 participants
291 discussions

bonding theory question
by Mag Gam 12 Nov '08

12 Nov '08

Hello All, I am currently using bonding with 2 NICs (using mode 0). Its been working well, but I am trying to understand how it works (I am a total newbie). mode=0 (balance-rr) Round-robin policy: Transmit packets in sequential order from the first available slave through the last. This mode provides load balancing and fault tolerance. So I have 2 NICs (1 NIC attached to switch A, 2nd NIC attached to switch B). I have 1 virtual interface. bon0. Suppose data is being pushed out, it will go with 1st NIC and when it gets overloaded it will use 2nd NIC. The bonding driver will be responsible for it. Similar to the push, the pull will be very similar. The data gets pulled and the bonding driver will assemble the packets together? Does this sound right? Sorry for a newbie question... TIA

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Tired of Fedora, shopping for a new OS. Upgrade from F8 ? CentOS kernel versions ?
by Linuxguy123 09 Nov '08

09 Nov '08

I've been a RH/Fedora guy since the RH8 days. When Fedora came along, I moved to it, but its been a bit painful beta testing software all the time. I ran Ubuntu for a while, but I found their package management to be difficult... I do a lot of technical work, development and loading and building special stuff. I much prefer RPMs over other methods of package distribution. Presently I'm miffed with the Fedora community. Back in July I blindly upgraded to F9 because I was in need of a few things that it shipped with. Little did I know it contained KDE4 or more precisely a rough, unfinished version of KDE4. I stuck with it, however, and upgraded to KDE4.1 and finally to KDE 4.1.2. About a month ago I received a new laptop. Being it was a new machine, I did a fresh install of F8 on it, thus dumping KDE4. While all has been well since then, I am watching the KDE4 release schedule and noting that I don't think KDE4 is going to be done, ie polished and ready to use until late spring, 2009. I've also noted the Fedora is going to abandon support for F8 before Christmas. As F9 contains a very bleeding edge version of KDE4, I am loathe to upgrade to it. Thus I am shopping for a new OS to solve this problem and the problem of continually being a beta tester if one is an up to date Fedora user. With Fedora it seems that one just gets a new installation working nicely when support for it is dropped and the cycle starts all over again. I'd like to get away from that. So... questions. a) I am running F8 right now. Most, but not all, of the package versions seem about the same as CentOS 5.2. Kernels are the notable exception to this rule. Could I forego F8 updates for a while, to leave CentOS catch up, and then add the CentOS repository to my repo list and "update" to the CentOS via yum ? b) One of the things I really need are up to date (bleeding edge) kernels. For example, F8 has 2.6.26 kernels, whereas CentOS appears to be running 2.6.18 kernels. I do know how to build my own kernels, but that is a pain. Does someone keep a separate repository that has more modern kernels ? Can yum be configured to use only specific packages (ie kernels) from a specific repository ? c) Is there any problem with using the livna repository for various things that I might need ? I notice that they don't have a CentOS specific repository, but would it be OK to point to F8 or so and use those RPMs ? Thanks I'm listening if you have any other comments or advice on my situation. LG

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VMWare Sandbox
by Thom Paine 05 Nov '08

05 Nov '08

I need to experiment with ldap for a site I manage, and wondered if vmware would be a good way to go for some testing. My current server is RHEL3, which is getting dated, and I think that I should refresh this server entirely in the move to ldap. We need to have an ldap server for publishing email addresses for a VPN for a nursing home that the upstream can harvest and we can browse to send confidential patient records. RHEL3 prollie won't cut it, so I'm considering moving to CentOS5. If I get a nice working test environment working, I wondered about running the server on VMWare, because the hardware will likely need to be refreshed in 2 years anyways. Copying the vmware file and the data to a new server would make for a fast upgrade. Any feedback on what I am attempting to do here? Any other recommendations on how I should tackle this? Currently I'm using Samba 3 with passdb. It's nothing fancy, but it works. We have about 20 XP machines here. The server also hosts mail as well. -- -=/>Thom

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Using CentOS repos in a RHEL machine
by Marcelo M. Garcia 05 Nov '08

05 Nov '08

Hi I have 2 machines with RHEL 5.2 and I would like to use CentOS repos. I would like to know if the document "Using CentOS Repositories on RHEL Machines"[1] can be used in CentOS 5.2 without too much modifications. Thanks Marcelo [1] http://wiki.centos.org/HowTos/PackageManagement/YumOnRHEL

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boot problems
by fabian dacunha 04 Nov '08

04 Nov '08

Dear All, I am quite new to centos i had installed centos 5.2 to be as a squid proxy server and it was working fine for over a month or so but 3 days back the machine after a reboot jus refused to boot it jus was goin to the grub prompt i wd really apprecite if someone cd help me .. cd i boot from centos boot cd n go to rescue mode and check grub 2) if grub is OK how cd i reinstall centos without destroying data 3) any other tps to check out the problem cd be highly apprecited regards Fabian -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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[OT] List of all email users
by Jussi Hirvi 04 Nov '08

04 Nov '08

This is not CentOS-specific, hence OT. I need a list of all email users on my system (there are hundreds of them). The list could be extracted from /etc/aliases and the virtusertable. Does anyone know of a script that would do this automatically? It would have to - exclude commented-out lines (of course) - exclude duplicates - produce a list of usernames (or maybe unresolved email addresses for some users) separated by a comma I imagine perl would be the way to go. I haven't used perl at all myself. Regards, Jussi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. & fax +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi(a)greenspot.fi * http://www.greenspot.fi

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device driver useage
by Geoff Galitz 03 Nov '08

03 Nov '08

Under Centos 5.X, how can I determine with 100% certainty what driver is associated with a given device other than referencing dmesg? For example, what tool can I use to tell for sure what driver is attached to my eth0 device? I have searched the web, but could not find anything that answered my question. Geoff Galitz Blankenheim NRW, Deutschland http://www.galitz.org

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mysql 4 > 5 export import issue
by Tom Brown 03 Nov '08

03 Nov '08

Hi I am migrating a mailserver from CentOS 4 to 5 and i am migrating the db's over from mysql-max-4.1.13 to mysql-server-5.0.45-7.el5 during the mysql import it fails with this... ERROR 1062 (23000) at line 129: Duplicate entry '3-r��?�' for key 1 anyone got any clues to this one as so far i have drawn a blank thanks

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Regd: SeLinux Configuration
by Balaji 03 Nov '08

03 Nov '08

Dear All, Currently i have using CentOS4.4 and Kernel Version is 2.6.9-42.EL. I have disabled selinux on kickstart installation and command is *selinux --disabled * Can any one help me or guide me to 1. Enable the selinux 2. Selinux Customize my own policy Regards -S.Balaji

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Dazuko module Panda Antivirus
by Gopinath Achari 03 Nov '08

03 Nov '08

Hi, I installed Panda antivirus for linux but it uses Dazuko module for updating virus definition downloaded from internet to virus definitions database. So i downloaded dazuko ( tar package) software and tryed to install. But it generates the below defined errors, Which module in the kernel has to be enabled. Please help me i am using Centos 5.2 with kernel version of 2.6.18-92.1.13.el5xen [gopinath@localhost dazuko-2.3.5]$ ./configure checking host system type... Linux checking for make utility... ok (make) checking for C compiler... ok (cc) kernel source in /lib/modules/2.6.18-92.1.13.el5xen/source... yes kernel build source in /lib/modules/2.6.18-92.1.13.el5xen/build... yes acquiring Linux kernel code configuration... ok checking if Linux is RSBAC patched... no checking if devfs is enabled... no discovered host system... Linux (2.6.18) checking if security module support is enabled... yes verifying capabilities are not built-in... built-in :( error: capabilities are built-in to the kernel: you will need to recompile a kernel with capabilities as a kernel module regards Gopinath .

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Discuss October 2008