The Sysadmin Kit is a collection of useful scripts used for Linux sysadmins bundled into one big script.
Add to .bashrc
Check High CPU usage
Check Disk Usage
New user script
https://github.com/ranger/ranger A VIM-inspired filemanager for the console
https://github.com/hishamhm/htop htop is an interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.