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How to: Mount an ISO image under Linux

cw — Sat, 15 May 2010 18:17:04 +0000

Posted in Linux

Procedure to mount ISO images under Linux 1) You must login as a root user 2) Create the directory i.e. mount point: # mkdir -p /mnt/temp_disk1 3) Use mount command to mount iso file called disk1.iso with loop option: # mount -o loop disk1.iso /mnt/temp_disk1 Now you should be able to access all the files [...]

virtual server on my rhel 5 not starting

cw — Sat, 25 Jul 2009 13:27:54 +0000

Posted in Linux Opsware SAS OS

Sometime ago installed my RedHat 5 with xen. Then I needed to create a virtual server running RedHat 4 in it, all needed to be 64 bit because Opsware required 64 bit RHEL AS4, so had to come up with an inexpensive solution. Got Intel Quad from Dell for $400 with 8gb ram, inexpensive desktop, [...]

Freshly installed RedHat – Root logins are not allowed

cw — Mon, 04 May 2009 21:39:41 +0000

Posted in Linux

Just installed Red Hat AS4 and I am unable to login with root account. Passwd is all set but I am getting popup message saying “Root logins are not allowed”, simple solution is to press CTRL+ALT+F1 and switch to console login and you will be on your way Nice and simple.

ipcalc – perform simple manipulation of IP addresses

cw — Sat, 02 May 2009 21:38:14 +0000

Posted in Linux

This utility is so cool, how many times I did try to figure out netmasks, broadcasts etc, this utility actualy performs simple manipulation of IP addresses: ipcalc – provides a simple way to calculate IP information for a host. The various options specify what information ipcalc should display on standard out. Multiple options may be [...]

Reinstalling the Boot Loader on Linux Red Hat server

cw — Thu, 16 Apr 2009 21:13:18 +0000

Posted in Linux

I had server that rebooted and then was hanging at the GRUB line and was not booting, so I did decide to reinstall grub which seems like it did help. Here is the procedure that I did to get it boot again: Reinstalling the Boot Loader In many cases, the GRUB boot loader can mistakenly [...]

yum repolist – how to check what yum repository is pointing at.

cw — Mon, 30 Mar 2009 15:39:37 +0000

Posted in Linux

How to check what repository is your yum setup to retrieve packages from? [root@server1 ~]# yum repolist Loaded plugins: rhnplugin, security repo id repo name status rhel-i386-server-5 Red Hat Enterprise Linux (v. 5 for 32-bi enabled : 5,186 rhel-i386-server-clu RHEL Clustering (v. 5 for 32-bit x86) enabled : 116 rhel-i386-server-clu RHEL Cluster-Storage (v. 5 for [...]

how to change timezone on my redhat server

cw — Thu, 26 Mar 2009 02:00:50 +0000

Posted in Linux

How do I change my system timezone from the command line without using redhat-config-date? In order to change the timezone of your system you will need to access the file /etc/sysconfig/clock directly: #ZONE=”America/New_York” ZONE=”GMT” UTC=false ARC=false Note: If your system’s BIOS has UTC set to true, then set UTC to true. If it has it [...]

How to mount iso image under linux RedHat

cw — Mon, 16 Mar 2009 02:47:10 +0000

Posted in Linux

To mount /root/linux.iso file under /mnt directory. issue the following commands. # mount -o loop /root/linux.iso /mn/linux to unmount # umount /mnt/linux for example: # mkdir /mnt/sol-10-u6-ga1-sparc-dvd # mkdir /mnt/rhel4.7-x86_64-as-dvd # mkdir /mnt/rhel-server-5.3-x86_64-dvd # # mount -o loop /media/opsware/sunos/sol-10-u6-ga1-sparc-dvd.iso /mnt/sol-10-u6-ga1-sparc-dvd # mount -o loop /media/opsware/linux/RHEL4.7-x86_64-AS-DVD.iso /mnt/rhel4.7-x86_64-as-dvd # mount -o loop /media/opsware/linux/rhel-server-5.3-x86_64-dvd.iso /mnt/rhel-server-5.3-x86_64-dvd # mkdir /mnt/en_winxp_pro_with_sp2 [...]

Linux Multipathing

cw — Sun, 01 Mar 2009 20:03:32 +0000

Posted in Linux UNIX

Physically connect HBA to disk array. Create LUN on disk array (50 GB in this case). Reboot server to see new LUN. Note 2 separate device files with same size. This is normal. Reboot again and interrupt the boot process and enable BIOS on the HBA card by pressing Control-Q. Find disk device names (select [...]

disk add on linux hog8

cw — Wed, 03 Jan 2007 04:48:28 +0000

Posted in HM Linux

I have few dysks setup, local and on SAN, I needed to add additional 200gb partition to a system that is on SAN and I am not sure how to do it so that I would not mess this up. Here is what I have: [root@hog8 etc]# df -k Filesystem 1K-blocks Used Available Use% Mounted [...]