Bash script
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Screenshot of a Bash session
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| Original author(s) | Brian Fox |
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| Initial release | June 8, 1989 |
| Stable release |
4.4.5 / November 16, 2016
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| Repository | git |
| Written in | C |
| Operating system |
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| Platform | GNU |
| Available in | Multilingual (gettext) |
| Type | Unix shell, command language |
| License | GNU GPL v3+ |
| Website | www |
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. First released in 1989, it has been distributed widely as the default shell for Linux distributions and Apple's macOS (formerly OS X). In 2016 it was also made available by Microsoft for use in Windows 10 Anniversary Update, albeit not installed by default.
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 are all copied from sh. Other features, e.g., history, are copied from csh and ksh. Bash is a POSIX shell, but with a number of extensions.
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