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

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.

It’s possible to customize Linux command shell prompt with $PS1 environment variable, which could be useful to identity a live or test server you’re working on.

Do you what Kernel Build Options are enabled or used to compile the Linux kernel on your system? How to check it out if a Linux program requires a specific Kernel Build Option to run?

What happen if you telnet clients unable to remote access Linux server, with an error message that says “Name or service not known: illegal seek”.