tldr/pages/linux/whatis.md

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# whatis
> Display one-line descriptions from manual pages.
- Display a description from a man page:
`whatis {{command}}`
- Don't cut the description off at the end of the line:
`whatis --long {{command}}`
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- Display descriptions for all commands matching a glob:
`whatis --wildcard {{net*}}`
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- Search man page descriptions with a regular expression:
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`whatis --regex '{{wish[0-9]\.[0-9]}}'`