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Bash

Snippet from Wikipedia: Bash (Unix shell): In computing, Bash is an interactive command interpreter and programming language developed for Unix-like operating systems. It is designed as a 100% free alternative for the Bourne shell, `sh`, and other proprietary Unix shells. Bash has gained widespread adoption and is commonly used as the default login shell for numerous Linux distributions.
Created in 1989 by Brian Fox for the GNU Project, it is supported by the Free Software Foundation. Bash (short for "Bourne Again SHell") can operate within a terminal emulator, or text window, where users input commands to execute various tasks. It also supports the execution of commands from files, known as shell scripts, facilitating automation.
The Bash command syntax is a superset of the Bourne shell, `sh`, command syntax, from which all basic features of the (Bash) syntax were copied. As a result, Bash can execute the vast majority of Bourne shell scripts without modification. Some other ideas were borrowed from the C shell, `csh`, and its successor `tcsh`, and the Korn Shell, `ksh`. It is available on nearly all modern operating systems, making it a versatile tool in various computing environments.

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