About Bash
Bash is the GNU Project's shell—the Bourne Again SHell.
Bash is the shell, or command language interpreter, the name is an acronym for the ‘Bourne-Again SHell’.
Bash is largely compatible with sh and incorporates useful features from the Korn shell ksh and the C shell csh.
It offers functional improvements over sh for both interactive and programming use.
A shell script is a computer program designed to be run by the Unix/Linux shell which could be one of the following:
The Bourne Shell
The C Shell
The Korn Shell
The GNU Bourne-Again Shell
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