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The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a command interpreter for shell scripting. Zsh is an extended Bourne shell with many improvements, including some features of Bash, ksh, and tcsh. Zsh was created by Paul Falstad in 1990 while he was a student at Princeton University.
If EDITOR is set to Emacs, you type part of the name, and then Escape, Escape. The Z shell (zsh) pioneered the support for fully programmable completion, allowing users to have the shell automatically complete the parameters of various commands unrelated to the shell itself, which is accomplished by priming the shell with definitions of all ...
Support for command history means that a user can recall a previous command into the command-line editor and edit it before issuing the potentially modified command. Shells that support completion may also be able to directly complete the command from the command history given a partial/initial part of the previous command.
[27] "csh, tcsh, zsh, ash, and scsh are all released under the BSD or a BSD-like license." August 1978 (): Digital Equipment Corporation introduced the VT100. 1983 () The TENEX C shell "introduced file name and command completion in addition to command-line editing features. The tcsh was developed by Ken Greer at Carnegie Mellon University."
As KornShell was initially only available through a proprietary license from AT&T, a number of free and open source alternatives were created. These include pdksh , mksh , Bash , and Z shell . The functionality of the original KornShell, ksh88 , was used as a basis for the standard POSIX.2 , Shell and Utilities, Command Interpreter (IEEE Std ...
The Bourne shell (sh) is a shell command-line interpreter for computer operating systems.It first appeared on Version 7 Unix, as its default shell. 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.
It was modeled after the Multics shell, developed in 1965 by American software engineer Glenda Schroeder. Schroeder's Multics shell was itself modeled after the RUNCOM program Louis Pouzin showed to the Multics Team. The "rc" suffix on some Unix configuration files (for example, ".vimrc"), is a remnant of the RUNCOM ancestry of Unix shells.
tcsh added filename and command completion and command line editing concepts borrowed from the Tenex system, which is the source of the "t". [9] Because it only added functionality and did not change what already existed, tcsh remained backward compatible [10] with the original C shell. Though it started as a side branch from the original ...