What is Bash
Bash (also known as Bourne Again Shell) is a sh-compatible command language interpreter.
It is a language that provides a user interface for certain operating systems. It also incorporates some features from the Korn and C shells.
Bash was written by Brian Fox and was first released in 1989 as an improvement of and replacement for the Bourne shell. It runs in a text window where users can type commands that will result in actions.