Introduction to Unix CLI

What is Unix CLI?

Unix CLI is actually the shell, a text interface to the operating system. Shell interprets and executes your commands and their arguments by passing them to the operating system.
There are different shell variants, like bash, csh, ksh, sh, tcsh, etc., probably the most popular being bash. The name “bash” is an acronym for “Bourne Again SHell” and is an enhanced replacement for sh. In this short introductory we are going to cover bash.

Bash

Bash is an interactive and scriptable shell. Supports name expansion, wildcards and typing shortcuts.

Note: Interacting with bash is case-sensitive just like everything in Unix system.

Some useful shortcuts:

TAB, UP, DOWN, Ctrl+R, Esc+.