Using LVM in Linux Rescue Mode
So, the OS disk at one of RHEL boxen on my vm farm is toasted and I need to check the health of the remaining disks, which are using LVM2.…
Registering new IBM tape drive on Redhat Linux
So, we recently swapped 3 faulty tape drives on our TS3310. The library is connected through FC, so there’s no need for the box to be booted off for us…
Unmounting while “device is busy”
So, one of these days, you will find yourself wanting to unmount a partition on your linux box. Problem is, most of the time, the partition is most likely still…
Create Linux user accounts in bulk
creating 1 or 2 new users on your system is a fairly simple task. But when you need to create 50 or 100 accounts on a system, creating it one…
Moving Volume Groups between hosts in RHEL
This is a fairly straight-forward process. Exporting the volume group from its current host Unmount any LV residing on that particular VG. In my case, there’s only one LV on…
Using sysstat and kSar, a sysstat grapher
If you’re into linux server administration, then sysstat is a very handy tool to have. It allows you to collect realtime and historical data about your server performance, and it’s…
IBM Tape drive serial number in Redhat, AIX, and HP-UX
One thing that you need to set up LanFree on TSM (or any kind of SAN Fiber channel backup) is the serial number of the tape drive registered on your…
PHP 5.3 & MySQL 5.1 for RHEL 4.x
For those who are still using RHEL 4.x and in need of deploying PHP 5.3 & MySQL 5.1 , you can get the required rpm packages from here. You can…
ORA-27054 on RHEL
I previously encountered this issue on my 10.2 RAC nodes running on top of HP-UX. I faced it the 2nd time when performing postclone operation on a Oracle EBS 12.0.0.5…
SSH Public key authentication failed, login still request for password
Some time ago, I was asked to setup a public key authentication for SCP session betwen 2 *nix servers. The process should be straight forward, as mentioned on my previous…