Trick to increase or to reduce the size of /dev/shm in Linux.

How much the size of Linux swap partition should be allocated?

You may able to find the installation number from Red Hat Enterprise Linux 5 system itself if you lost it for whatever reasons.

Useful tips about how the ps command option switches are used to assist system administrator find out which running processes with top CPU and memory usage.

Can you customize the Linux Command Prompt message and color for different users? Yes, why not.

The tips to display timestamp in Linux history command output.

You may able to reset or recover a forgotten Windows 7 account password with the Trinity Rescue Kit freeware.