UNIX Shell: Difference between revisions
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[[Category:UNIX Shell]] |
#REDIRECT [[:Category:UNIX Shell]] |
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The '''UNIX Shell''' is a component of terminal-based UNIX-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. |
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=Implementation= |
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The UNIX Shell may be implemented by any of a wide variety of programs. Notable programs used as shells include the [[Bourne SHell]], the [[Korn SHell]], and the [[Bourne Again SHell]]. |
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=Language= |
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While UNIX Shells vary in the programming languages they support, such languages carry a minimum set of features. Each language allows the programmer to execute 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. |
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This one tells the operating system to use the [[Bourne SHell]]: |
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#!/bin/sh |
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This line tells the operating system to use the [[Bourne Again SHell]]: |
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#!/bin/bash |
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And this one tells the operating system to use the [[Korn SHell]]: |
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#!/bin/ksh |
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Each header line consists of a hash, a bang, and the path to the interpreter binary. |
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{{Programming Language}} |
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Latest revision as of 13:31, 6 February 2007
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