100 Useful Command-Line Utilities

by Oliver; 2014

85. apropos

The apropos command will display commands related to the string you give it as an argument. For instance:
$ apropos grep
bzegrep [bzgrep]     (1)  - search possibly bzip2 compressed files for a regular expression
bzfgrep [bzgrep]     (1)  - search possibly bzip2 compressed files for a regular expression
bzgrep               (1)  - search possibly bzip2 compressed files for a regular expression
egrep [grep]         (1)  - print lines matching a pattern
fgrep [grep]         (1)  - print lines matching a pattern
git-grep             (1)  - Print lines matching a pattern
grep                 (1)  - print lines matching a pattern
grep                 (1p)  - search a file for a pattern
pgrep                (1)  - look up or signal processes based on name and other attributes
pkill [pgrep]        (1)  - look up or signal processes based on name and other attributes
ptargrep             (1)  - Apply pattern matching to the contents of files in a tar archive
xzgrep               (1)  - search compressed files for a regular expression
xzgrep [lzegrep]     (1)  - search compressed files for a regular expression
xzgrep [lzfgrep]     (1)  - search compressed files for a regular expression
xzgrep [lzgrep]      (1)  - search compressed files for a regular expression
xzgrep [xzegrep]     (1)  - search compressed files for a regular expression
xzgrep [xzfgrep]     (1)  - search compressed files for a regular expression
zgrep                (1)  - search possibly compressed files for a regular expression
zipgrep              (1)  - search files in a ZIP archive for lines matching a pattern

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