Bash (Unix shell)
Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell.
Description
First released in 1989, it has been distributed widely as it is a default shell on the major Linux distributions and OS X.
Bash is a command processor that typically runs in a text window, where the user types commands that cause actions. Bash can also read commands from a file, called a script.
Like all Unix shells, it supports filename globbing (wildcard matching), piping, here documents, command substitution, variables and control structures for condition-testing and iteration.
The keywords, syntax and other basic features of the language were all copied from sh. Other features, e.g., history, were copied from csh and ksh.
Bash is a POSIX shell, but with a number of extensions.
Etymology o
The shell's name is an acronym for Bourne-again shell, punning on the name of the Bourne shell that it replaces and on the term "born again" that denotes spiritual rebirth in contemporary American Christianity.
See also
External links
- Bash (Unix shell) @ Wikipedia
