UNIX Shell
Thisprogramming language may be used to instruct a computer to perform a task.

Execution method:	Interpreted
Lang tag(s):	bash
See Also:	UNIX Shell on the HOPL

Listed below are all of the tasks on Rosetta Code which have been solved using UNIX Shell.

TheUNIX Shell is a component of terminal-basedUNIX-derived systems which offers both a command-line interface for running system commands, as well as programming interface for intelligently automating tasks which use system commands.

There are many UNIX Shells and most of them can be categorized into two families. For purposes of the Rosetta Code, all examples are in Bourne-compatible syntax. The other family of shells, with a markedly different syntax, arecsh (C Shell) and itstcsh (Tenex C Shell) "clone." Common Bourne compatible shells include the originalBourne Shell (/bin/sh on most versions of UNIX), the GNUBourne Again SHell (bash --- which is linked to/bin/sh on many distributions ofLinux, making it their default shell), theKorn Shell (ksh), thePublic Domain Korn SHell (pdksh), theAlmquist SHell (ash) and theDebian Almquist SHell (dash) and theZ SHell (zsh).

Main article:UNIX Shell Implementations

While UNIX Shells vary in the programming languages they support, such languages carry a minimum set of features. Each language allows the programmer toexecute system commands as though he were typing the commands himself, and each language allows for a header line which specifies which shell implementation is used to interpret the script.

This one tells the operating system to use theBourne Shell:

#!/bin/sh

This line tells the operating system to use theBourne Again SHell:

#!/bin/bash

And this one tells the operating system to use theKorn Shell:

#!/bin/ksh

Each header line consists of a hash, a bang, and the path to theinterpreter binary.

• Execution method/Interpreted
• Programming Languages