CLI: Quick command execution

There are very handy shortcuts available on the command line , lets just list em out.

• Execute last command
• $ !!
• well this feature is really useful when you want to execute last command again but with sudo privileges.
• $ sudo !!
• Go forward/backward command history with Ctrl+n and Ctrl+p.
• Access the last command argument with Alt + .
• Use reverse-i-search by pressing Ctrl+r to search the history in reverse order.