Discuss September 2006

discuss@lists.centos.org

275 participants
362 discussions

Safely updating to 4.4 via yum (chicken)
by techlist 13 Oct '06

13 Oct '06

Hi guys: I saw the pelthora of threads where people had trouble moving to 4.4. So I'm chicken now and I was trying to wait for the dust to settle, I suppose it has and its been long enough I'm nervous about not upgrading. I need to do a a production server that is located in a data center far away so even more than normal I want a smooth upgrade. Can someone tell the what the concensous was on the best way to do the upgrade and avoid problems. From my notes I got: yum upgrade python-sqlite yum upgrade sqllite yum upgrade yum yum clean all yum update But at least one guy said his box was still hosed with duplicates and a broken bind after that. What's the method to upgrade 4.3-> 4.4 with the highest change of sucess? Thanks very much for the help. Scott

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Trimming the fat out of a Centos 4.4 Installation
by Erick Perez 10 Oct '06

10 Oct '06

Hi, just to avoid re-inventing the wheel, is there any document that can help me reduce even further a "minimum" installation of Centos 4.4 (BTW can you say 600mb is minimum)? I am in the process of creating a small Centos-4.4-based Asterisk box and I need to boot it from a CF card. Deleting useless packages will help me do what i want. Example: even a minimum install of Centos 4.4 (or Redhat EL for what is worth) includes CUPS, among other things. Any document hyperlink will be more than welcomed!! The result will be posted to the link for others to use. -- ------------------------------------------------------------ Erick Perez Panama Sistemas Integradores de Telefonia IP y Soluciones Para Centros de Datos Panama, Republica de Panama Cel Panama. +(507) 6694-4780 ------------------------------------------------------------

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LAMP benchmarking tool
by Joseph Cheng 05 Oct '06

05 Oct '06

Is anyone using a reliable Linux/Apache/MySQL/PHP benchmarking suite? There are benchmark software for individual pieces but I hope there is one tool or several small tools that act together to give a picture of how long a request takes from entering Apache, to PHP, to MySQL and then back to the client.TIA!

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Problems with 2.3TB disk
by Shawn Everett 05 Oct '06

05 Oct '06

Hi Guys, I have a server running CentOS 4.2 with a 2.6.9-22EL-smp kernel. The system contains a 2.3 TB RAID 5 array. There is a 20GB root partition with the remainder of the drive configured one large LVM volume. (/u0) I have installed Veritas Netbackup on the server and am running a few tests. Small backups and restores work just fine. When I run a larger backup (500MB) and store the backup file on /u0/vrts the files within the backup cannot be restored. I thought at first this was a Veritas problem but have also discovered... I cannot do any of the following to the backup file: Use cat, dd or cp to copy the file. The first part of the file aproximately 24MB will copy and then I get the error message: Input/output error Checking dmesg shows: dm-0: rw=0, want=31933816664, limit=4838391808 attempt to access beyond end of device dm-0: rw=0, want=32472792952, limit=4838391808 attempt to access beyond end of device dm-0: rw=0, want=33011769240, limit=4838391808 attempt to access beyond end of device dm-0: rw=0, want=33550745528, limit=4838391808 attempt to access beyond end of device dm-0: rw=0, want=34089721816, limit=4838391808 How do I access the files in question? Any suggestions or enlightment would be greatly apreciated. Shawn

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yum libxml2mod
by Jesus Bernardo Ruiz Flores 03 Oct '06

03 Oct '06

I have a problem using yum. it gives me the following error [root@mail1 src]# yum update yum There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: /usr/lib/python2.3/site-packages/libxml2mod.so: undefined symbol: xmlNewDocPI Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above module doesn't match the current version of Python, which is: 2.3.4 (#1, Mar 10 2006, 06:12:09) [GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] If you cannot solve this problem yourself, please go to the yum faq at: http://wiki.linux.duke.edu/YumFaq I have looked in Internet and others forums but i couldn't find any answer on how to fix this error.

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Re: [CentOS] Installing Java 1.4.2
by Robert Moskowitz 03 Oct '06

03 Oct '06

Back home and back working on my servers.... At 11:13 AM 1/6/2006, Jim Perrin wrote: >On 1/6/06, Robert Moskowitz <rgm(a)htt-consult.com> wrote: > > At 10:45 AM 1/6/2006, Rodrigo Barbosa wrote: > > > > > > >Unfortunately, that won't do. That java implementation you see is the > > >GNU one. For Scalix, you will need Sun's JDK. You can get it at > > >www.java.com, if I recall. > > > > thanks. Does that mean I unistall the GNU one? Or installing the > > SUN one will 'override' the GNU one. > >No you don't need to uninstall the gnu one. Java on rhel uses (or >should, in a perfect world) the alternatives framework, which allows >for multiple programs to provide an application or utility. That said, >the java packages from sun are a bit braindead. You can get the java >sdk rpm or bin from sun and install it but it won't do much for you, >and it doesn't put java in a place where the system can "Just use it". >The best way is to get the sun java sdk package, and then get the sun >java compat rpm from jpackage.org -> >http://jpackage.org/rpm.php?id=3320 > >This rpm tells your system all about the sun install and sets things >up for you in alternatives so that you can begin using your shiny new >non-GNU java. How can I be sure of the dependencies? What yum command would I run afterwards? How do I get updates to this rpm over time? thanks!

4 3

adding a usb drive to an existing raid1 set
by rado 03 Oct '06

03 Oct '06

it seems like I keep running into a wall. The present raid array...well let me do an fdisk -l: ---------------------------------------- Disk /dev/hda: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 13 104391 fd Linux raid autodetect /dev/hda2 14 27651 222002235 fd Linux raid autodetect /dev/hda3 27652 30201 20482875 fd Linux raid autodetect /dev/hda4 30202 30401 1606500 5 Extended /dev/hda5 30202 30392 1534176 82 Linux swap Disk /dev/hdc: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hdc1 * 1 13 104391 fd Linux raid autodetect /dev/hdc2 14 27651 222002235 fd Linux raid autodetect /dev/hdc3 27652 30201 20482875 fd Linux raid autodetect /dev/hdc4 30202 30401 1606500 5 Extended /dev/hdc5 30202 30392 1534176 82 Linux swap Disk /dev/md0: 106 MB, 106823680 bytes 2 heads, 4 sectors/track, 26080 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md0 doesn't contain a valid partition table Disk /dev/md2: 20.9 GB, 20974338048 bytes 2 heads, 4 sectors/track, 5120688 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md2 doesn't contain a valid partition table Disk /dev/md1: 227.3 GB, 227330162688 bytes 2 heads, 4 sectors/track, 55500528 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md1 doesn't contain a valid partition table Disk /dev/sda: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 1 13 104391 fd Linux raid autodetect /dev/sda2 14 27651 222002235 fd Linux raid autodetect /dev/sda3 27652 30201 20482875 fd Linux raid autodetect /dev/sda4 30202 30401 1606500 5 Extended /dev/sda5 30202 30392 1534176 82 Linux swap kk...the ide drives; hda and hdc...3 partitions 3 arrays md0 1 and 2 cat /proc/mdstat shows it's acting as it should. when I boot the system up, it sees the drive connect thru usb and calls it sda (for what reason I don't know. I partitioned it to the same specs as the 2 ide drives as per the bottom of fdisk -l. Now, trying to go by: http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/admin-guide/ 5.9.8.2 Creating RAID Arrays they state the following: Next, it is necessary to create the /etc/raidtab file. This file is responsible for the proper configuration of all RAID arrays on your system. The file format (which is documented in the raidtab(5) man page) is relatively straightforward. Here is an example /etc/raidtab entry for a RAID 1 array: ummm...1.)I think this is part of the old raidtools thang...not mdadm but I am not sure. 2.) there is no man raidtab on this box which is a "everything" install.. so considering this..lol I'm lost. kk, right now...I just formatted all the partitions and (I should have done this before ) I am checking for bad blocks. If it finds some I'll just redo it or whatever I have to do. At one point I was able to mdadm /dev/md0 1 & 2 --add sda1 2 &3 and cat /proc/mdstat would show sda1 2 &3 as in the arrays but then they would not populate. I can't remember but I think I gave them mount points but wait, I was having a hard time finding the proper syntax for that as well anyway, after rebooting...it was all gone. this ain't nice thx John Rose

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pam.d configuring ssh service to authenticate against radius servers
by Devraj Mukherjee 02 Oct '06

02 Oct '06

Hi Everyone, Has anyone tried to configure the ssh service under pam.d to authentication against a radius service? I have compiled and installed the pam_radius_auth module but am unable to get the configurations working properly. Any samples configurations will be appreciated. Thanks. -- "I never look back darling, it distracts from the now", Edna Mode (The Incredibles)

2 2

firewall issue
by Ski Dawg 02 Oct '06

02 Oct '06

Hello everyone, I am setting up a new system for use as a testing/demo/trial-and-error system. I have installed CentOS 4.4 on it. There is not an X-environment, so I will need to fix this from the command line (via ssh access). I am trying to do an nfs export from this box to another on my internal home network. I have figured out that it is a firewall issue on the CentOS box (I turn off the CentOS firewall and the mount works). My problem is that I am not sure how to resolve this. I have not done any configuration with iptables before. In the file /etc/sysconfig/iptables are the lines: -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 2049 -j ACCEPT and there are not any deny lines above these. I think those lines were added when I ran system-config-securitylevel-tui. Those are the only lines that I can find that mention port 2049 or nfs. Those lines look to me like they are for accepting incoming connections only. Is that correct? What do I need to do so that I can do the nfs export out of this box? -- Doug Registered Linux User #285548 (http://counter.li.org) ---------------------------------------- Random Thought: no maintenance: Impossible to fix.

3 7

Hardware or Software RAID w/CentOS 4.4 & Gigabyte GA-81945GZME-RH motherboard
by Dale 30 Sep '06

30 Sep '06

Hi all, Helping a friend setup a new machine - it will be a low volume web and mail server. He wants to set it up with 2 drives in a mirror setup. The motherboard he bought supports mirroring on the hardware level. I have heard of issues before using hardware raid on Linux systems. Which way would you recommend we go on this? Thanks for any suggestions. Dale

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Discuss September 2006