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centos5: NFS panic during unmount
by Narasimha Valiveti 27 Jul '07

27 Jul '07

Hello, Just noticed a NFS panic on centos5 (no updates applied yet). I don't have the serial console attached yet to get the exact stack. However, here is the stack: shrink_dcache_for_umount generic_shutdown_super kill_anon_super nfs_kill_super deactivate_super mntput_no_expire do_exit sys_exit_group sys_exit_group syscall_call . . . EIP: shrink_dcache_for_umount_subtree [root@xx]# uname -a Linux xx 2.6.18-8.el5 #1 SMP Thu Mar 15 19:57:35 EDT 2007 i686 i686 i386 GNU/Linux While I plan to install the latest update, has anyone seen this with centos5 and do you know which update fixes this ?. Thanks for the help, - vnr

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A Thank you to the Developers for the Free Software
by Ow Mun Heng 27 Jul '07

27 Jul '07

I was feeling a bit un-appreciated as a Developer and I thought of all the other developers of Open Source (Free) Software who relentlessly contribute to/make Open Source (free) software. I just wanted to take some time to officially say *Thank You* for all the good things which you guys/gals have made to my(/our) benefit, of which has either saved my skin or improved my work efficiency. To All of you, I say a Big Thank You for it. Let no one tell you that you are Un-appreciated for all the hard work you have poured into your relevant projects. Seriously, Thank you.

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DVD Drive Recommendations
by Camron W. Fox 27 Jul '07

27 Jul '07

Alle, Our customer is looking for a drive with the following specs that works (but is not necessarily supported by the vendor, that would be gravy) on CentOS4/5: DVD hyper multidrive, capable of reading and writing DVD-R, DVD-RW, DVD+R, DVD+RW, DVD-RAM, DVD-R for DL, and DVD+R DL. The HP DVD940e (USB 2.0, but that is *not* a requirement, http://www.shopping.hp.com/product/desktop/dvd_writers/1/storefronts/RX901A…) was suggested but we are not familiar with it at all. Does anyone have any suggestions/experience they wish to share? Best Regards, Camron -- Camron W. Fox Hilo Office High Performance Computing Group Fujitsu America, INC. E-mail: cwfox(a)us.fujitsu.com

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Major problem with software raid
by ajulvestad 27 Jul '07

27 Jul '07

Ok, this is the case: I've got two raid-5 arrays with software raid, both with three disks. Setup: md0 has hdb2, hdd1 and sda1 md1 has hdb5, hdd3 and sda3 Tonight, the system lost power due to a power spike. The result was a reboot where it attempted to fix the raid, but it didn't exactly work. I have now booted a live CD and using utilities there. It seems the checksum value is slightly off for all disks. And the update time is the same for some disks, but not all. When I try mdadm --assemble /dev/md1 (or md0) with various options like force, scan, auto, etc - I get error messages like only 1 drive found, not enough.. no disks found and no mention of md0/1 found in config file. What should I do? Which partitions (two in each array) do I pick as "these two are the one I should rebuild with"? And how do I actually FORCE mdadm to start an array with those two set devices? See files in http://gandalf.n4f.no/~aj/md/ for output from mdadm. Assistance deeply appreciated...

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source rpms for fedora
by Dave 27 Jul '07

27 Jul '07

Hello, I'm running centos5. There's some rpms that exist on fedora that are not in centos5 in it's repos. I was wondering if it was possible to set up yum to get only selected packages in source rpm form ou of a fedora repo and install them on centos? In that way they could be recompiled for centos5. Thanks. Dave.

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Thank you: Wiki data for adding 3rd party repository, ProtectBase and Priorities
by Lanny Marcus 26 Jul '07

26 Jul '07

This is a public thank you, to whoever wrote the Wiki's for adding 3rd party repositories, ProtectBase and Priorities. Clear, excellent, step by step instructions. I did this late last night and I missed the thing that Priorities is the recommended plugin, so I will change to that, from ProtectBase. :-) Lanny

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CentOS 5 Live USB
by Mark Rose 26 Jul '07

26 Jul '07

I took a stab at making a bootable CentOS 5 Live USB pendrive and I ended up with a kernel panic. I was able to do this with a live CD of CentOS 4, but it seems the same procedure does not work for the new version. Has anyone been able to accomplish this? Any and all thoughts are apprecicated! Mark

4 6

Firefox freezes for a few seconds, since update to v.1.5.0.12
by Lanny Marcus 26 Jul '07

26 Jul '07

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.12) Gecko/20070719 CentOS/1.5.0.12-0.3.el4.centos Firefox/1.5.0.12 I updated Firefox a few days ago. Now, very frequently, it freezes, for a few seconds, each time. Is this a known bug? Does it have a simple cure? TIA, Lanny

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rpms for 32 bit
by Tony Barratt 26 Jul '07

26 Jul '07

Hello! Need to install the required rpmz to support 32bit apps on 64bit Centos 4. How to find out which rpmz are needed? TIA Tony

2 1

CentOS based router dropping connections
by Jesse Cantara 26 Jul '07

26 Jul '07

Hello, I am trying to figure out a problem I'm having using CentOS on a machine as a router. The short story is: any traffic routed through the router seems to get disconnected at random occasionally. The hardware setup is: I have two switches, the router sits between them, the webserver on the LAN switch. The machine I'm using for the router is a Dell 860 1U rackmount with two NICs, one NIC on the internet, one NIC on the LAN. The routing setup is: I'm using IPTABLES for routing, with the following command: iptables -t nat -A PREROUTING -p tcp -m tcp -i eth1 --dport 6680 -j DNAT --to 192.168.1.10:80 Basically, I'm forwarding port 6680 on to the webserver (.10) on the LAN. What I have tested so far: If I'm at the router, I can download files from the webserver just fine, so the webserver setup and physical connection is OK. If I'm at the router, I can download files from the internet just fine, so the physical connection to the outside is OK as well. If I'm on the outside of the router (on the internet) I can download files directly from the router just fine. The issue is when I try to download a file from the webserver via the router (port 6680). It will work sometimes, but other times it will randomly disconnect me, at random points during the download. Watching the traffic on a packet-sniffer shows that right before the download fails, my client computer trying to download the file keeps resending "ACK" messages, the router keeps sending the next sequence of packets, and eventually the router sends a bunch of "RST" packets. There aren't any strange messages in /var/log/messages or dmesg in either the router or the webserver I need some help diagnosing this problem. Here's some info about the router: CentOS 5 latest kernel 2.6.18-8.1.8.el5 iptables v1.3.5 I've tried testing as much as I can before asking for help, but I'm at the end of what I know to try. Any leads as to where to look to diagnose, or what might cause this would help. Thanks in advance, -Jesse

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