Tcsh

Tcsh

Infobox Software
name = TENEX C Shell


caption = Screenshot of a sample tcsh session
developer = Ken Greer, Paul Placeway, et. al
latest_release_version = 6.15.00
latest_release_date = March 03, 2007
operating_system = Various
genre = Unix shell
license = BSD License
website = http://www.tcsh.org/

tcsh ( IPA|/,tiː 'siː ʃɛl/, IPA|/'tiː ʃɛl/, or IPA|/,tiː siː ɛs 'eɪtʃ/) is a Unix shell based on and compatible with the C shell (csh). It is essentially the C shell with programmable command line completion, command-line editing, and a few other features.

History

The 't' in tcsh comes from the T in TENEX, an operating system which inspired Ken Greer, the author of tcsh, with its command-completion feature. [ [http://www.tcsh.org/tcsh.html/THE_T_IN_TCSH.html THE T IN TCSH] ] Ken Greer worked on tcsh in the late 1970s at Carnegie Mellon University. Paul Placeway from The Ohio State University continued work on it in the 1980s, and since then it has been maintained by numerous people. Wilfredo Sanchez, the former lead engineer of Mac OS X, worked on tcsh in the early 1990s at MIT.

Deployment

Early versions of Mac OS X shipped with tcsh as the default shell, but it has since been replaced by bash. Iowa State's implementation of MIT's Project Athena (Project Vincent) by default uses tcsh as the default shell, although users can change this. [ [http://web.mit.edu/olh/Working/Working.html#shell Working on Athena (AC-11) ] ]

The tcsh is the default shell of FreeBSD and its descendants like DragonFly BSD, PC-BSD and DesktopBSD.

References

External links

* [http://www.tcsh.org/ tcsh Home Page]
* [http://www.tcsh.org/tcsh.html/top.html tcsh manual page]
* [http://www.kitebird.com/csh-tcsh-book/ Archive for the O'Reilly book "Using csh and tcsh"]
* [http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/ "Csh Programming Considered Harmful"] by Tom Christiansen


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