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interpreter directive
An interpreter directive is a computer language construct that is used to control which interpreter parses and interprets the instructions in a computer program. It is also commonly referred to as an interpreter designator.
*In Unix, Linux and other Unix-like operating systems (OS) the Shebang (#!) command is the first line in a script, as it is used to tell the OS shell that this file is to be executed and what scripting language to use when executing the script commands.
An example would be ''#!/bin/bash'', meaning run this script with the bash shell found in the /bin directory. The file system permissions must also be set so the script may be executed.〔(【引用サイトリンク】url=http://tldp.org/LDP/abs/html/sha-bang.html )〕〔(【引用サイトリンク】url=http://www.in-ulm.de/~mascheck/various/shebang/ )〕
* Other systems or files may use some other ''magic number'' as the interpreter directives. (Shebang's ''#!'' magic number is a code value ''23 21'' followed by the path to an interpreter.)
== See also ==
* List of scripting languages
* Architecture description language
* Command line interpreter
* Shebang (Unix)
* Bourne shell
* Bourne-Again shell
* C shell
* Python (programming language)
* Filename extension, ''Command Name Issues'' section
* Perl
* Scripting language
* Unix shell
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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