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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 .
The shells bash, zsh and PowerShell offer this as a specific feature. [69] [70] Shells which do not offer this as a specific feature may still be able to turn off echoing through some other means. Shells executing on a Unix/Linux operating system can use the stty external command to switch off/on echoing of input characters. [71]
Environment Modules on Scientific Linux, CentOS, and Red Hat Enterprise Linux distributions in the environment-modules package include modules.csh and modules.sh scripts for the /etc/profile.d directory that make modules initialization part of the default shell initialization. One of the advantages of Environment Modules is a single modulefile ...
There are many variants of Unix shell: Bourne shell sh. Almquist shell (ash) Debian Almquist shell (dash) Bash (Unix shell) bash; KornShell ksh. Z shell zsh; C shell csh. TENEX C shell tcsh; Ch shell ch; Emacs shell eshell; Friendly interactive shell fish; PowerShell pwsh; rc shell rc, a shell for Plan 9 from Bell Labs and Unix; Stand-alone ...
A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language , and is used by the operating system to control the execution of the system using shell scripts .
A modern zsh installation comes with completion definitions for over five hundred commands. Tcsh offers default file, command, and variable name completion activated using Tab ↹. The 'complete' builtin command provides fully programmable completion. The source code comes with a 'complete.tcsh' file containing many examples of its completion ...
As a result, getopts is now available in shells including the Bourne shell, KornShell, Almquist shell, Bash and Zsh. [4] The getopts command has also been ported to the IBM i operating system. [5] The modern usage of getopt was partially revived mainly due to an enhanced implementation in util-linux.
While Bash was developed for UNIX and UNIX-like operating systems, such as GNU/Linux, it is also available on Android, macOS, Windows, and numerous other current and historical operating systems. [12] "Although there have been attempts to create specialized shells, the Bourne shell derivatives continue to be the primary shells in use."