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34758 discussions

Motherboards for HPC applications
by Eduardo Grosclaude 12 Mar '10

12 Mar '10

Hello, Can somebody recommend CentOS-OK, dual socket motherboards for compute elements? A quick look up at Intel pages suggests they are thinking of them as "server boards", but then they recommend them as "for SMB", I'm somewhat puzzled about it. It would be nice to know what MBs you are using, pros and cons. Thank you in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina

12 24

crontab and/or anacrontab ?
by Timothy Murphy 12 Mar '10

12 Mar '10

Is one meant to have one or the other? If so, which is recommended? I have -------------------------------- [tim@helen etc]$ cat anacrontab # /etc/anacrontab: configuration file for anacron # See anacron(8) and anacrontab(5) for details. SHELL=/bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root 1 65 cron.daily run-parts /etc/cron.daily 7 70 cron.weekly run-parts /etc/cron.weekly 30 75 cron.monthly run-parts /etc/cron.monthly -------------------------------- [tim@helen etc]$ cat crontab SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root HOME=/ # run-parts 01 * * * * root run-parts /etc/cron.hourly 02 4 * * * root run-parts /etc/cron.daily 22 4 * * 0 root run-parts /etc/cron.weekly 42 4 1 * * root run-parts /etc/cron.monthly -------------------------------- I didn't write either of these, they must have been automatically installed. My impression is that anacrontab was ignored until recently, but now as far as I can see both are being read and acted on. Any enlightenment gratefully received. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

5 12

NetworkManager trouble with CentOS 5.4 and KDE3
by Martin Jungowski 11 Mar '10

11 Mar '10

I'm evaluating CentOS 5.4 for our company and one of our requirements is that it must also run on laptops. I've managed to get everything working so far except for wireless networks. The problem here seems to be that CentOS fails to provide a knetworkmanager package, and we're using KDE3 for various reasons. Thus, we're limited to Networkmanager-gnome which works but fails to save passwords in KDE3 and only works in Gnome. Of course kwallet is installed but requires knetworkmanager to work. The only solution I found so far was to log into Gnome, connect to the wireless network and save the password but that's certainly NOT an opion. I guess the question is quite simple: how do I get NetworkManager to save passwords in KDE3? It's a critical issue and switching to Gnome is not an option either. Infact it's Novell's decision to ditch KDE3 and focus on KDE4 instead that made us turn our backs on openSUSE in the first place. So, is it possible to solve this teeny-tiny problem some other way? Thanks in advance, Martin -- Rieke Computersysteme GmbH Hellerholz 5 D-82061 Neuried Email: martin(a)rhm.de

3 5

Dependency problems with Yum update
by Todd Cary 11 Mar '10

11 Mar '10

I am spoiled with Yum: never have had a dependency problem until today. Can this be resolved: ---> Downloading header for compat-openldap to pack into transaction set. compat-openldap-2.3.27_2. 100% |=========================| 30 kB 00:00 ---> Package compat-openldap.i386 0:2.3.27_2.2.29-4.el4.centos set to be updated --> Running transaction check --> Processing Dependency: libmysqlclient.so.14(libmysqlclient_14) for package: dovecot --> Processing Dependency: libmysqlclient.so.14 for package: perl-DBD-MySQL --> Processing Dependency: libmysqlclient.so.14 for package: mod_auth_mysql --> Processing Dependency: libmysqlclient_r.so.14 for package: MySQL-python --> Processing Dependency: libmysqlclient_r.so.14(libmysqlclient_14) for package: MySQL-python --> Processing Dependency: libmysqlclient.so.14 for package: dovecot --> Finished Dependency Resolution Error: Missing Dependency: libmysqlclient_r.so.14 is needed by package MySQL-python Error: Missing Dependency: libmysqlclient.so.14(libmysqlclient_14) is needed by package dovecot Error: Missing Dependency: libmysqlclient.so.14 is needed by package dovecot Error: Missing Dependency: libmysqlclient.so.14 is needed by package perl-DBD-MySQL Error: Missing Dependency: libmysqlclient.so.14 is needed by package mod_auth_mysql Error: Missing Dependency: libmysqlclient_r.so.14(libmysqlclient_14) is needed by package MySQL-python Many thanks from a Linux user that knows just enough to keep it running... Todd -- Ariste Software Petaluma, CA 94952 http://www.toddcary.com/aristephotography/

9 27

ooimpress in show only mode
by Jerry Geis 11 Mar '10

11 Mar '10

hi all. Look at ooimpress on centos 5 x86_64. been trying to find a way to get it to just show a power point and not show the editor screen. tried: ooimpress -show pp.ppt ooimpress -invisible -show pp.ppt ooimpress -headless -show pp.ppt and others I always get the editor window. Did some google searching and didnt find anything... Was wondering if anyone knows how to start impress and not show the editor. I just want to see the power point in slide show mode. Thanks, Jerry

4 3

VNC viewer blank screen
by Vijay Shanker Dubey 11 Mar '10

11 Mar '10

Hi, I have configured vnc on my centos server machine. But, unable to access the vnc client. When ever i try to access my client. All I get is a blank screen with only mouse working. I am very clue less about the problem, Can I find out this error. Regards, Vijay Shanker Dubey

3 8

An odd IPMI problem
by m.roth＠5-cent.us 11 Mar '10

11 Mar '10

Well, we're figure the board's got problems, but I installed OpenIPMI a couple weeks ago, and fired it up as a service, then added a cron job. That all ran well until last evening; we came in to find 5 zillion emails complaining Unable to open SDR for reading I worked my way through logs, and googling, and then trying to run ipmitool by hand, and it complains there's no such device as /dev/ipmi[three versions]. More googling, and down to modprobe, then insmod, of ipmi_si. Then trying to give it parameters, and it continually comes back (after 5 min of trying) with "No such device". One thing I note: after I found the docs for IPMI, I found the list of parms <http://www.mjmwired.net/kernel/Documentation/IPMI.txt>, and gave it, among other things, the slave_attrs. Then I look at dmesg and /var/log/messages... and it seems to be utterly ignoring that parm. That is, I say (and get) $ insmod /lib/modules/2.6.18-164.11.1.el5/kernel/drivers/char/ipmi/ipmi_si.ko ports=0xca2 slave_addrs=0x10 insmod: error inserting '/lib/modules/2.6.18-164.11.1.el5/kernel/drivers/char/ipmi/ipmi_si.ko': -1 No such device and in the log Mar 10 11:24:36 south kernel: IPMI System Interface driver. Mar 10 11:24:36 south kernel: ipmi_si: Trying hardcoded-specified kcs state machine at i/o address 0xca2, slave address 0x0, irq 0 Mar 10 11:26:28 south kernel: ipmi_si: There appears to be no BMC at this location Mar 10 11:26:28 south kernel: ipmi_si: Trying SMBIOS-specified kcs state machine at i/o address 0xca2, slave address 0x20, irq 0 Mar 10 11:28:20 south kernel: ipmi_si: There appears to be no BMC at this location Mar 10 11:30:12 south kernel: ipmi_si: Unable to find any System Interface(s) Notice that it's looking at slave_addrs of 0x0 and 0x20, *not* 0x10. Any clues? mark

4 4

unable to get domain status from libvirt & KVM
by Tom Georgoulias 11 Mar '10

11 Mar '10

I have a python script that monitors the VMs on physical host servers running Xen, but the script doesn't work properly on a server I just built with KVM. The script runs as a non-root user and simply gathers some details on the status and names of the domains running on the host. Both Xen and KVM servers are running the same version of libvirt (libvirt-0.6.3-20.1.el5_4) and have the same, default /etc/libvirt/libvirtd.conf config file. To troubleshoot, I've been running python interactively. Here's how my Xen servers behave: $ python Python 2.4.3 (#1, Sep 3 2009, 15:37:37) [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import libvirt >>> conn = libvirt.openReadOnly(None) >>> domains = conn.listDomainsID() >>> print domains [0, 3, 15, 16, 21, 24, 26, 30, 32, 36, 38, 41, 43, 45, 47, 49, 51, 55, 63, 67] >>> When I try the same thing on the KVM server: $ python Python 2.4.3 (#1, Sep 3 2009, 15:37:37) [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import libvirt >>> conn = libvirt.openReadOnly(None) 14:33:07.303: error : No vport operation path found for host0 14:33:07.320: error : No vport operation path found for host4 14:33:07.325: error : No vport operation path found for host3 14:33:07.367: error : No vport operation path found for host1 14:33:07.368: error : No vport operation path found for host2 >>> domains = conn.listDomainsID() >>> print domains [] >>> (The vport stuff is weird, but I found this posting that suggests its harmless (http://www.mail-archive.com/libvir-list@redhat.com/msg17477.html) so I'm ignoring it.) However, when logged in as root on the KVM server, it works just like my Xen servers: # python Python 2.4.3 (#1, Sep 3 2009, 15:37:37) [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import libvirt >>> conn = libvirt.openReadOnly(None) >>> domains = conn.listDomainsID() >>> print domains [1] Again, on the KVM server, plain old "virsh list" with the debug level set to "2" $ export LIBVIRT_DEBUG=2 $ virsh list 14:21:06.532: error : No vport operation path found for host0 14:21:06.550: error : No vport operation path found for host4 14:21:06.555: error : No vport operation path found for host3 14:21:06.598: error : No vport operation path found for host1 14:21:06.599: error : No vport operation path found for host2 14:21:06.615: info : No security driver available Id Name State ---------------------------------- Permissions in /var/run/libvirt: # ls -ld /var/run/libvirt/* srwx------ 1 root root 0 Feb 5 08:53 /var/run/libvirt/libvirt-sock srwxrwxrwx 1 root root 0 Feb 5 08:53 /var/run/libvirt/libvirt-sock-ro drwxr-xr-x 2 root root 4096 Jan 21 14:38 /var/run/libvirt/network drwxr-xr-x 2 root root 4096 Oct 20 18:50 /var/run/libvirt/qemu Can someone provide some tips on what else I can check, if this might be a bug, or point out any mistakes that I might've made? Any help is appreciated. Thanks, Tom

3 3

About addition of hardware and kernel
by Jose Luis Marin Perez 11 Mar '10

11 Mar '10

Dear Sirs I have a ML370 G4 server with 1 CPU Intel (R) Xeon (TM) 3.60GHz and 2GB of RAM with operating system CentOS 4.7 and kernel 2.6.9-78.0.22.ELsmp We have acquired 1 CPU and 2 GB of RAM additional to improve the functioning of the server, my question is whether the current kernel can support the addition of hardware or if I need a new kernel or install any additional software. Thanks Jose Luis _________________________________________________________________ Discover the new Windows Vista http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE

4 6

RAID 5 on Install?
by Slack-Moehrle 11 Mar '10

11 Mar '10

Hi All, I cannot seem to find a resource that will allow me to RAID5 3 x 1tb drives on system install. Can this be done? -jason

3 2

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