Description
The Bourne shell ( sh ) is a shell command-line interpreter for
computer operating systems.
The Bourne shell was the default shell for Version 7 Unix. Unix-like systems
continue to have /bin/sh—which will be the Bourne shell, or a symbolic link
or hard link to a compatible shell—even when other shells are used by most
users.
Developed by Stephen Bourne at Bell Labs, it was a replacement for the
Thompson shell, whose executable file had the same name—sh. It was released
in 1979 in the Version 7 Unix release distributed to colleges and
universities. Although it is used as an interactive command interpreter, it
was also intended as a scripting language and contains most of the features
that are commonly considered to produce structured programs.
It gained popularity with the publication of The Unix Programming Environment by Brian Kernighan and Rob Pike—the first commercially published book that presented the shell as a programming language in a tutorial form.
