Overview
What is Bash?
Bash (acronym for Bourne-Again SHell) is the shell, or command language interpreter for the GNU operating system. It is largely compatible with sh (original command-line interpreter) and incorporates useful features from other shell implementations such as ksh (Korn shell) and csh (C shell).
Bash is the default shell of the GNU operating system. It is quite portable, and currently runs on nearly every version of Unix and a few other operating systems.
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