Bourne shell (sh)



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Bourne shell (sh)


This is the original Unix shell written by Steve Bourne of Bell Labs. It is available on all UNIX systems.

This shell does not have the interactive facilites provided by modern shells such as the C shell and Korn shell. You are advised to to use another shell which has these features. The Bourne shell does provide an easy to use language with which you can write shell scripts.


C shell (csh)


This shell was written at the University of California, Berkeley. It provides a C-like language with which to write shell scripts - hence its name.

TC shell (tcsh)


This shell is available in the public domain. It provides all the features of the C shell together with emacs style editing of the command line.

Korn shell (ksh)


This shell was written by David Korn of Bell labs. It is now provided as the standard shell on Unix systems.

It provides all the features of the C and TC shells together with a shell programming language similar to that of the original Bourne shell. It is the most efficient shell. Consider using this as your standard interactive shell.


Bourne Again SHell (bash)


This is a public domain shell written by the Free Software Foundation under their GNU initiative. Ultimately it is intended to be a full implementation of the IEEE Posix Shell and Tools specification. This shell is widely used within the academic commnity.

bash provides all the interactive features of the C shell (csh) and the Korn shell (ksh). Its programming language is compatible with the Bourne shell (sh). If you use the Bourne shell (sh) for shell programming consider using bash as your complete shell environment.


Summary of shell facilities




Bourne C TC Korn BASH

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command history No Yes Yes Yes Yes
command alias No Yes Yes Yes Yes
shell scripts Yes Yes Yes Yes Yes
filename completion No Yes* Yes Yes* Yes
command line editing No No Yes Yes* Yes
job control No Yes Yes Yes Yes
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