Manual pager utils
apropos − search the manual page names and descriptions
apropos [ −dalhvV ] [ −e | −w | −r ] [ −s section ] [ −m system [,...]] [ −M path ] [ −L locale ] [ −C file ]
Each manual page has a short description available within it. apropos searches the descriptions for
instances of keyword .
keyword is usually a regular expression, as if (−r) was used, or may contain wildcards (−w), or match the
exact keyword (−e). Using these options, it may be necessary to quote the keyword or escape (\) the special
characters to stop the shell from interpreting them.
The standard matching rules allow matches to be made against the page name and word boundaries in the
The database searched by apropos is updated by the mandb program. Depending on your installation, this
may be run by a periodic cron job, or may need to be run manually after new manual pages have been
Print debugging information.
Print verbose warning messages.
Interpret each keyword as a regular expression. This is the default behaviour. Each keyword will
be matched against the page names and the descriptions independently. It can match any part of
either. The match is not limited to word boundaries.
Interpret each keyword as a pattern containing shell style wildcards. Each keyword will be
matched against the page names and the descriptions independently. If −−exact is also used, a
match will only be found if an expanded keyword matches an entire description or page name.
Otherwise the keyword is also allowed to match on word boundaries in the description.
Each keyword will be exactly matched against the page names and the descriptions.
Only display items that match all the supplied keywords. The default is to display items that
match any keyword.
Do not trim output to the terminal width. Normally, output will be truncated to the terminal width
to avoid ugly results from