NAME
apropos - locate commands by keyword lookup

SYNOPSIS
apropos [ -M path ] [ -m path ] keyword ...

DESCRIPTION
Apropos shows which manual pages contain instances of any of the
given keyword(s) in their title line. Each word is considered
separately and case of letters is ignored. Words which are part of
other words are considered; when looking for compile, apropos will
also list all instances of "compiler".

If the line output by apropos starts "name(section) ..." you can
enter "man section name" to get its documentation.

The options are as follows:

M Override the list of standard directories which apropos
searches for a database named whatis.db. The supplied path
must be a colon (":") separated list of directories. This
search path may also be set using the environment variable
MANPATH.

m Augment the list of standard directories where apropos
searches for its database. The supplied path must be a colon
(":") separated list of directories. These directories will
be searched before the standard directories or the directories
specified using the M option or the MANPATH environment
variable.

ENVIRONMENT
MANPATH
The standard search path used by apropos may be overridden by
specifying a path in the MANPATH environment variable. The
format of the path is a colon (":") separated list of
directories.

FILES
/usr/man/whatis.db database

SEE ALSO
man(1), whatis(1), whereis(1)