Zsh is a UNIX command interpreter (shell) usable as an interactive login shell and as a shell script command processor. Of the standard shells, zsh most closely resembles ksh but includes many enhancements. It does not provide compatibility with POSIX or other shells in its default operating mode: see the section Compatibility.

Zsh has command line editing, builtin spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and a host of other features.


Zsh was originally written by Paul Falstad <>. Zsh is now maintained by the members of the zsh-workers mailing list <>. The development is currently coordinated by Peter Stephenson <>. The coordinator can be contacted at <>, but matters relating to the code should generally go to the mailing list.


Zsh is available from the following HTTP and anonymous FTP site. )

The up-to-date source code is available via Git from Sourceforge. See for details. A summary of instructions for the archive can be found at

Mailing Lists

Zsh has 3 mailing lists:


Announcements about releases, major changes in the shell and the monthly posting of the Zsh FAQ. (moderated)


User discussions.


Hacking, development, bug reports and patches.

To subscribe or unsubscribe, send mail to the associated administrative address for the mailing list.


All submissions to zsh-announce are automatically forwarded to zsh-users. All submissions to zsh-users are automatically forwarded to zsh-workers.

If you have problems subscribing/unsubscribing to any of the mailing lists, send mail to <>. The mailing lists are maintained by Karsten Thygesen <>.

The mailing lists are archived; the archives can be accessed via the administrative addresses listed above. There is also a hypertext archive, maintained by Geoff Wing <>, available at

The Zsh FAQ

Zsh has a list of Frequently Asked Questions (FAQ). The contact address for FAQ-related matters is <>.

The Zsh Web Page

Zsh has a web page which is located at This is maintained by Karsten Thygesen <>, of SunSITE Denmark. The contact address for web-related matters is <>.

See Also

man page sh(1), man page csh(1), man page tcsh(1), man page rc(1), man page bash(1), man page ksh(1)

IEEE Standard for information Technology - Portable Operating System Interface (POSIX) - Part 2: Shell and Utilities, IEEE Inc, 1993, ISBN 1-55937-255-9.