Introduction In traditional UNIX environment using CLI (Command Line Interface) is more interesting and powerful other than using GUI. Specially if some one have to work with UNIX server edition without GUI he has to face big difficulty if he is poor with CLI. With new versions of ubuntu it is providing GUI interface to replace CLI commands. Any way still there are some hidden terminal commands that forgot to GUI, so that having good knowledge of CLI is important. 1. Commands for configure softwares Description Command Install software sudo apt-get install [PackageName] Install ALL the required components using 1 single command sudo tasksel Run .sh (shell commands) files sudo sh filename.sh 2.Monitor Ubuntu software processes Description Command List all process currently running ps aux List selected packge's processes ps aux | grep [package name] many more 3.Common File Operations Description Command Rem