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RE: [CentOS] Confirming grub installation
by Bowie Bailey 10 Jun '08

10 Jun '08

Peter Farrell wrote: > > 2008/6/9 Bowie Bailey <Bowie_Bailey(a)buc.com>: > > I have two drives in a software mirror. Other than setting the > > bios to boot from the second drive, is there any way to confirm > > that grub is installed properly on the second drive? > > When installing CentOS - sometimes the RAID-1 /boot partition, usually > /dev/md0 fails to boot. > > The bug is known and exists on the bugtracker for CentOS as well as > RedHat. > > The fix is to re-install GRUB on on each partition of the RAID-1 > array. > > I think you could use the same method to answer your question. <SNIP> > If you then want to test it, disconnect one of your drives - or just > drop into grub at boot > and tell it to boot from the partition of another drive. I already know how to install grub on the second drive. The issue is that this is a production server and I'm trying to avoid rebooting it if possible. I'm looking for a way to determine whether grub is installed on a drive WITHOUT having to actually attempt to boot from it. If I redo the installation, then I can be sure it's installed, but if it's already there, I'd rather leave it alone. There's no point in messing with it if it's already installed. -- Bowie

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Clustersuite package installation failed in Itanium server
by Balaji 10 Jun '08

10 Jun '08

Dear All, I am new in Itanium server Installation and I have installed all the CentOS4.4 ia64 CDs and I have try to install clustersuite packages and i am getting the following error messages like error: %post(package name here) scriptlet failed, exit status 255 and error: %pre(package name here) scriptlet failed, exit status 255 problem Cluster Suite RPMS are ccs-1.0.7-0.i686.rpm ccs-devel-1.0.7-0.i686.rpm cman-1.0.11-0.i686.rpm cman-devel-1.0.11-0.i686.rpm cman-kernel-2.6.9-45.4.centos4.i686.rpm cman-kernel-hugemem-2.6.9-45.4.centos4.i686.rpm cman-kernel-smp-2.6.9-45.4.centos4.i686.rpm cman-kernheaders-2.6.9-45.4.centos4.i686.rpm dlm-1.0.1-1.i686.rpm dlm-devel-1.0.1-1.i686.rpm dlm-kernel-2.6.9-42.12.centos4.i686.rpm dlm-kernel-hugemem-2.6.9-42.12.centos4.i686.rpm dlm-kernel-smp-2.6.9-42.12.centos4.i686.rpm dlm-kernheaders-2.6.9-42.12.centos4.i686.rpm fence-1.32.25-1.i686.rpm gulm-1.0.8-0.i686.rpm gulm-devel-1.0.8-0.i686.rpm iddev-2.0.0-3.i686.rpm iddev-devel-2.0.0-3.i686.rpm ipvsadm-1.24-6.i386.rpm kernel-hugemem-2.6.9-42.EL.i686.rpm kernel-smp-2.6.9-42.EL.i686.rpm magma-1.0.6-0.i686.rpm magma-devel-1.0.6-0.i686.rpm magma-plugins-1.0.9-0.i386.rpm perl-Net-Telnet-3.03-3.noarch.rpm piranha-0.8.2-1.i386.rpm rgmanager-1.9.54-1.i386.rpm system-config-cluster-1.0.25-1.0.noarch.rpm We are not sure why this is happening. Can some one throw light on this. Regards -S.Balaji

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mac address in prompt
by Gergely Buday 10 Jun '08

10 Jun '08

Hi there, for some reasons bash writes out my host's mac address as a result of including \h in PS1. Do you know why? This was not always so. [gergoe@x0-13-xx-xx-xx-xx ~]$ echo $PS1 [\u@\h \W]\$ - Gergely

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School Server Setup
by Harry Sukumar 10 Jun '08

10 Jun '08

Hello All!!! I was wondering if you can help me little bit.... I am trying to help (voluntary service) a country side school (Aboriginal community) in Northern Queensland Australia setup lab infrastructure, it's a very remote school and they don't have enough funds to go commercial The school has only till grade 6 They have 25 machines that was bought out of the government grant but none of the machines come with windows I was asked by the school president to setup lab infrastructure currently they have Internet (Dynamic) with only two machines connected I have asked them to change the plan to Static IP address which I presume will be done some time this week I have decided to go Linux on all the machines including the server Could some one please cast some light on how I can carry on with this project, I am not sure where to start and I am fairly new to Linux and system administration world Currently what's in my mind is to setup fedora on all desktop and CentOS5 as my server with following services configured Proxy-squid (all the traffic to pass through) Firewall Apache Squirrel mail DNS DHCP I am not sure where to start with this project Your help will be highly appreciated by the little kids who have never even touched a computer before in there life!!! -- Many Thanks Harry

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Hardware Specs
by Victor Padro 10 Jun '08

10 Jun '08

Hello all! I was wondering if you can help me a little bit... My boss wants me to do some research in finding which hardware is most used under Linux(ex. Dell servers, Barebones Kits, HP & Compaq servers, etc.) This is just for budgeting issues...he wants to get rid of some old and obsolete hardware we run and wants to know which hardware could be easy to deploy on the server side and workstations side(common user boxes will be decided for HP or Dell leasing quotes - Obviously M$ Windows Vista). So if you could just state your hardware I'll be very greatful. We run several servers based on RHEL, Debian(Couple Ubuntus), CentOS, running services such as Sendmail, Apache, JBoss, Postgres, Oracle, Samba and DNS. We have around 5000 users logging on these servers. Workstations are basically used for CAD, monitoring, developing in Java, PHP, Oracle, etc. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Hola a todos! Me preguntaba si me pueden ayudar un poco... Mi jefe quiere que haga un poco de investigacion para ver que hardware es el que mas se usa corriendo Linux(ej. servidores Dell, servidores HP & Compaq, equipos armados, etc.) Esto es por el presupuesto que tendremos ademas se quiere deshacer del equipo viejo y obsoleto que tenemos, quiere saber que tipo de hardware es el que facil de desplegar/utilizar en el lado de los servidores y de las estaciones de trabajo(los equipos de los usuarios comunes[los mortales] serian decidos por los leasing que Dell o HP nos cotize, obviamente con M$ Windows Vista) Asi que si pueden describir su hardware se los agradecere. Corremos varios servidores basados en RHEL, Debian(un par de Ubuntus), CentOS usando servicios como Sendmail, Apache, JBoss, Postgres, Oracle, Samba y DNS. Tenemos mas o menos 5000 usuarios loggeandose en estos servidores. Las estaciones de trabajo son basicamente usadas con software CAD, monitoreo, desarrollando en Java, PHP, Oracle, etc. Thank you/Gracias. Victor Padro

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Confirming grub installation
by Bowie Bailey 10 Jun '08

10 Jun '08

I have two drives in a software mirror. Other than setting the bios to boot from the second drive, is there any way to confirm that grub is installed properly on the second drive? -- Bowie

2 1

new hardware & centos / fedora
by rmoktali＠vsnl.net 10 Jun '08

10 Jun '08

hi, Hardware: core2duo(E8400)/Intel Classic Board DG33FBC / 2x2GB I have been trying to install 5.1x64 for it's longterm support and xen but it just does not install till acpi=off is passed. works with one core after that and does not power off. Install stops at ACPI: PCI Root Bridge [PCI0] (0000:00) below is the reply from intel. ============================================================== Thank you for contacting Intel(R) Technical Support. Regarding your technical question, we regret to inform you that Linux* is not a supported Operating system for the Intel(R) Desktop Board DG33FB. Please review the following list for supported Operating systems for your Desktop Board. http://intel.com/support/motherboards/desktop/sb/CS-008326.htm Intel(R) Technical Support cannot provide assistance or drivers on operating systems that are not supported by the specific motherboard. Also, be aware that Intel(R) Desktop Boards do not support manually changing the IRQs, as the OS usually handles this. You can try disabling the onboard audio to check if you get rid of the POST error message. ============================================================== the dmesg from Centos5.1 install after acpi=off is here http://www.pastebin.ca/1043584 Fedora 9 does not seem to have problem and installs fine. the dmesg is here http://www.pastebin.ca/1043590 Maybe we need to wait for another year or two for upstream and centos to catchup. :) -- rm

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vsftp 553 Could not create file
by lingu 10 Jun '08

10 Jun '08

HI, I am facing problem in connecting ftp from the windows client. CENTOS5U1 Running vsftp daemon. From linux client i am able to upload and download. When i do an ftp upload of any files or folders from windows command line i am getting below error . *vsftp 553 Could not create file* *NOTE: SELINUX IS DISABLED AND THERE IS NO FIREWALL RUNNING* See my user permission and ownership details User i am using is paps ll -ld /home/paps/ drwxr-xr-x 2 paps dba 4096 Jun 10 23:09 /home/paps/ My vsftp configuration cat /etc/vsftpd/vsftpd.conf |grep -v \# anonymous_enable=YES local_enable=YES write_enable=YES local_umask=022 dirmessage_enable=YES xferlog_enable=YES connect_from_port_20=YES xferlog_file=/var/log/vsftpd.log xferlog_std_format=YES listen=YES pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES Regards lingu

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netboot, vnc and no keyboard/mouse/monitor
by dnk 10 Jun '08

10 Jun '08

hey guys, I just created a custom netboot cd, that launches and loads from a http source, but connects to a vnc listening viewer. All in all, not hard to do, but what is different with this one is that it skips the media check, has no prompts and allows you to start the install on a machine that has no keyboard/mouse/monitor. Was handy for me as when i have some boxes to load, I just plug in power and ethernet in the corner (or where ever I have room) and go through the install. I know it also works with a cd as a source (if you use it from cd 1), and assume it would also work with a DVD (have not tested yet). If you would like it, I can add to the wiki if anyone would like it. DNK

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Device Mapper and pretty names
by Joseph L. Casale 10 Jun '08

10 Jun '08

How does one view the dm-{n} names wrt the actual dev names? I assume it involves dmsetup but I cant figure it out. I am using iostat to track some busy disk io and don't know which dm-{n} to watch :) Thanks! jlc

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