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Korn Shell: Difference between revisions
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Korn Shell is derived from and compatible with Bourne Shell.
(This shell combines Bourne Shell syntax with several more features. Show how to identify ksh93, pdksh, mksh or zsh.) |
m (Korn Shell is derived from and compatible with Bourne Shell.) |
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{{implementation|UNIX Shell}}
'''Korn Shell''', or ''ksh'', is the creation of David Korn at AT&T. This shell combines [[derived from::compatible with::Bourne Shell]] syntax with a command-line editor, command history, tilde expansion, arithmetic expressions, arrays, coprocesses and several more features. Korn Shell has influenced many later shells; [[Public Domain Korn Shell]] and [[Z Shell]] clone several features, and the X/Open and POSIX standards take a few features from Korn Shell. David Korn continues to maintain [[ksh93]], the original implementation.
AT&T freed ksh93 during 2000, using an open-source license. For many years before that, the original Korn Shell was not free; it was only part of AT&T System V and some commercial Unix variants. Therefore, ''ksh'' in some systems is not David Korn's shell, but is some other shell, perhaps ''pdksh'' or [[MirBSD Korn Shell|''mksh'']].
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