What is BASH?
In essence, BASH (Bourne Again Shell) is a command language interpreter. It was created by Brian Fox for the GNU Operating System and it is an alternative to the Bourne Shell. While it is comparable to Bourne Shell, it has several extra capabilities like command-line editing that make it simpler and more practical to use and because of this, BASH is the default user shell on most Linux installations. Essentially, it is a non-compiled, interpreted process that can also execute in the terminal window and has the ability to read commands from shell scripts.
