Discuss April 2008

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Centos v3.3 CD 2
by Luis-Miguel Astudillo 15 Nov '11

15 Nov '11

Sorry, I have been away for a while. has anyone fixed CD2 fotr CentOS v3.3 ? -- Luis

6 7

Lingering dhclient issue
by Alfred von Campe 23 Jun '11

23 Jun '11

I recently reconfigured some CentOS 4.3 systems that were using DHCP to use static IP addresses. At the same time, the systems were moved to a new VLAN. Here is the approximate sequence of events that took place: 1. ifdown eth0 2. edit /etc/sysconfig/network-scripts/ifcfg-eth0 with static IP address 3. wait for network folks to reconfigure switch 4. ifup eth0 I may have reversed steps 1 and 2 on some of the systems. The problem was that the dhclient process didn't go away, and kept renewing the old lease. Our DHCP server is configured to contact the DNS server and update the entry for each host it serves. So the DNS entries for these systems were pointing to the old address in the old VLAN. The eth0 interface itself just kept the static IP address for which it was configured. It took me a while to figure out what was going on. My question is, what could I have done to avoid this (other than killing the dhclient process)? Is there a better way to reconfigure an interface to use a static address? I am not interested in solutions that involve using a GUI (i.e., only command line solutions). Thanks, Alfred

9 17

what pkg contains libstdc++-libc6.2-2.so.3
by Fong Vang 02 Feb '11

02 Feb '11

In CentOS 4.1/2, what package contains this library: libstdc++-libc6.2-2.so.3? I installed a couple of the compat- packages, but this library is still missing.

8 8

mod_mono on centos5?
by Dave 07 Sep '09

07 Sep '09

Hello, Does anyone have mod_mono rpm or srpm compiled for centos5? Thanks. Dave.

4 4

Reformatting a USB drive
by Todd Cary 29 Sep '08

29 Sep '08

I have a USB drive that has been formatted as NTFS. Can I reformat it? I have identified these properties about it /dev/sda1 /media/Extrnl_Bkup Not sure what to do next since the GUI will not mount a NTFS disk (expected). Todd -- Ariste Software 2200 D Street Ext Petaluma, CA 94952 (707) 773-4523

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Reg. VNC server and Windows and Centos interworking
by Padmaja 13 Jul '08

13 Jul '08

Hi all, I have a Windows XP PC and a Centos PC (Centos 4.3 release, kernel- 2.6.9-34.EL) which are in the same LAN. Currently, I am able to use VNC server on the centos to view the Windows PC, but not able to view the Centos PC from the Windows PC. This applies for even file sharing also. The samba server is running and I can view the windows network from Centos PC but in the Windows network, not able to view the Centos PC. Also not able to print from Centos to the LAN printer. Any help is greatly appreciated. Thank You, Padmaja

7 10

NFS options on kernel parameters
by vincenzo romero 13 Jul '08

13 Jul '08

Hello, I am running an NFS server/PXE on a Cent OS 5.1 server. I have defined an NFS export with "no_root_squash" option in my /etc/exports file: # # NFS Export Files # /export/images *(rw,sync,no_root_squash) ... A client PXE boots as a diskless station to the above server into a root-NFS directory underneath the above /export/images export. When the client boots; the NFS export is NOT root-Squashing - whenever I touch a file, it is created as user nobody and NOT root. I would like to NFS root-squash the root directory. I believe that I am missing to pass a parameter in my kernel - (defined in .. /pxelinux.cfg/default) .. currently my kernel parameters are: APPEND root=/dev/nfs rw nfsroot=192.1.2.5:/export/images/root-fs ip=dhcp ... would anyone be kind to provide advise on how I can mount my client so that I am ensure that the "no_root_squash" setting is enabled? thanks in advace. -- best, Vince

3 3

simple load balancing/failover for OWA
by Ruslan Sivak 28 May '08

28 May '08

We are building an exchange cluster with two front end Outlook Web Access servers. We would like to at least have some sort of failover, and prefereably load balancing for them. The MS recommended way is to use NLB, but for various reasons that's not working with our set up. We are looking to set up a single linux server and use something like LVS to load balance/fail over the connections. Looking at LVS, it looks like it hasn't been updated in a while. Is it stable? Is it still the preferred solution? Since OWA has sessions, but no session replication, we would need something that can keep directing the same client to the same server (either by IP, or preferably by cookie). Can LVS handle this? I also saw that the latest version of Apache has some sort of load balancing support. Can it be used to set something like this up? We are looking for the simplest solution that won't require a lot of maintanence. We understand that having a single LVS box creates a single point of failure, and are willing to accept the risk for now to keep things simpler. Russ

4 5

Interface bonding?
by Timothy Selivanow 23 May '08

23 May '08

I'm try to bond a few interfaces together with the hopes of getting increased throughput, and I'm using a cisco Catalyst 2900 as the switch. I've tried using mode 0, 5, and 6 with nothing special on the switch, and mode 4 with some ports "trunked" together (I have a feeling that the "trunking" that the 2900 does is not 802.3ad, as it disabled the ports it saw as redundant), yet xfer speeds always cap out at about 10MB/s. Has any body accomplished bonding with increased throughput as the goal, with or without (without might be preferable) doing something special on the switch (preferably the afore-mentioned Catalyst 2900, as that is what I have to work with as a non-sactioned side-project ;)? --Tim ___________________________________________________ < When pleasure remains, does it remain a pleasure? > --------------------------------------------------- \ \ \ \ /\ ( ) .( o ).

10 42

howto use kvm-amd on centos 5.1
by Jerry Geis 18 May '08

18 May '08

Is there a way to use kvm-amd on centos 5.1? I dont want to mess with XEN. I want the hardware virtualization that is on my AMD chip. I played with putting 2.6.24 and centos 5.1 on my AMD laptop, got kvm-amd and that works. However I want to put this on my desktop that is running 2.6.18-53.1.14.el5. Is there a way or do I just wave to use 2.6.24 or 25. Thanks, Jerry

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Discuss April 2008