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'''unexpand''' is a command in the [[Unix|UNIX Operating System]]. It is used to convert groups of space [[character (computing)|character]]s into [[tab character]]s. |
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{{Infobox software |
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| name = unexpand |
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| operating system = [[Unix]] and [[Unix-like]] |
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| platform = [[Cross-platform]] |
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| genre = [[Command (computing)|Command]] |
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'''unexpand''' is a command in [[Unix]] and [[Unix-like]] [[operating system]]s. It is used to convert groups of space [[character (computing)|character]]s into [[tab character]]s.<ref>{{Cite web |title=unexpand - Compress spaces into tabs |url=https://www.ibm.com/docs/en/zos/2.4.0?topic=descriptions-unexpand-compress-spaces-into-tabs |access-date=2024-05-09 |website=www.ibm.com |language=en-us}}</ref> |
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For example: |
For example: |
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<syntaxhighlight lang="console"> |
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$ echo " asdf sdf" | unexpand | od -c |
$ echo " asdf sdf" | unexpand | od -c |
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0000000 \t \t a s d f s d f \n |
0000000 \t \t a s d f s d f \n |
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0000020 a s d f s d f \n |
0000020 a s d f s d f \n |
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0000032 |
0000032 |
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</syntaxhighlight> |
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</source> |
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Here the [[Echo (command)|echo command]] prints a string of text that includes multiple consecutive spaces, then the output is directed into the '''unexpand''' command. The resulting output is then displayed by the [[octal]] dump command [[Od (Unix)|od]]. At the second prompt, the same echo output is sent directly through the '''od''' command. As can be seen by comparing the two, the '''unexpand''' program converts sequences of eight spaces into single tabs (printed as '\t'). |
Here the [[Echo (command)|echo command]] prints a string of text that includes multiple consecutive spaces, then the output is directed into the '''unexpand''' command. The resulting output is then displayed by the [[octal]] dump command [[Od (Unix)|od]]. At the second prompt, the same echo output is sent directly through the '''od''' command. As can be seen by comparing the two, the '''unexpand''' program converts sequences of eight spaces into single tabs (printed as '\t'). |
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*[[List of Unix commands]] |
*[[List of Unix commands]] |
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*[[Expand (Unix)]] |
*[[Expand (Unix)]] |
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==References== |
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{{Reflist}} |
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==External links== |
==External links== |
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*[http://www.linuxmanpages.com/man1/unexpand.1.php] The program's [[manpage]] |
*[https://web.archive.org/web/20051031053512/http://www.linuxmanpages.com/man1/unexpand.1.php] The program's [[manpage]] |
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{{Unix commands}} |
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{{Core Utilities commands}} |
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[[Category:Unix SUS2008 utilities]] |
[[Category:Unix SUS2008 utilities]] |
Latest revision as of 01:44, 29 May 2024
Operating system | Unix and Unix-like |
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Platform | Cross-platform |
Type | Command |
unexpand is a command in Unix and Unix-like operating systems. It is used to convert groups of space characters into tab characters.[1]
For example:
$ echo " asdf sdf" | unexpand | od -c
0000000 \t \t a s d f s d f \n
0000014
$ echo " asdf sdf" | od -c
0000000
0000020 a s d f s d f \n
0000032
Here the echo command prints a string of text that includes multiple consecutive spaces, then the output is directed into the unexpand command. The resulting output is then displayed by the octal dump command od. At the second prompt, the same echo output is sent directly through the od command. As can be seen by comparing the two, the unexpand program converts sequences of eight spaces into single tabs (printed as '\t').
See also[edit]
References[edit]
- ^ "unexpand - Compress spaces into tabs". www.ibm.com. Retrieved 2024-05-09.