TLDR
Enter a command. For example: mktemp, pi, btrfs version, manpath.

whatis

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

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