bash stands for ``bourne again shell''. It is the GNU replacement to the traditional Unix Bourne shell (sh) and is the default shell in systems like Linux and FreeBSD.
bash-2.04: description + notes
Bash is a sh-compatible command language interpreter that executes commands read from the standard input or from a file. Bash also incorporates useful features from the Korn and C shells (ksh and csh) which make it attractive as an interactive shell.
Bash is ultimately intended to be a conformant implementation of the IEEE POSIX Shell and Tools specification (IEEE Working Group 1003.2).
Please refer to
man bashand the GNUinfodocumentation for further details.
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