Provided by: man-db_2.5.7-4_i386 bug

apropos -

apropos [-dalhvV] [-e|-w|-r] [-s

       ] [-m [,...]] [-M ] [-L ] [-C ]   ...

       (-r),
        (-w)      (-e).

         (\)    ,
          .

         .

        apropos mandb.    ,
          cron  ,
        .

       -d, --debug
                .

       -v, --verbose
                 .

       -r, --regex
                    .
                .
                    .
                   .

       -w, --wildcard

                 .
                    .
               --exact,
                      .
                   .

       -e, --exact

       -a, --and
               ,       .
                ,        .

       -l, --long
                   . ,
                      .

       -s , --section
                    .
                ,  "3",
                 "3", "3perl", "3x"   ;
                ,  "3perl",
                 .

       -m [,...], --systems=[,...]

               ,
               .        NewOS,
                -m NewOS.

                     ,
               .     whatis-
               ,      man.
                   $SYSTEM.

       -M , --manpath=
                  ( )
                .  , apropos
               $MANPATH,      , manpath      $PATH.
                  $MANPATH.

       -L , --locale=
              apropos,  ,        C-  setlocale(3),      , $LC_MESSAGES  $LANG.
              ,
                , apropos. ,
                  .

       -C , --config-file=

               ~/.manpath.

       -h, --help
                   .

       -V, --version
                 .

       0        .

       1          ,
                 .

       2        .

       16         .

       SYSTEM     $SYSTEM
               -m.

       MANPATH
                  $MANPATH,
                 ( )
                .

       MANWIDTH
                  $MANWIDTH,
                   ( --long).    ,    , ,   ioctl(2) $COLUMNS.     ,
               80 .

       POSIXLY_CORRECT
                  $POSIXLY_CORRECT,
               ,    apropos
                (-r).   ,
                .

       /usr/share/man/index.(bt|db|dir|pag)
                   index.

       /var/cache/man/index.(bt|db|dir|pag)
               FHS     index.

       /usr/share/man/.../whatis
                  whatis.

       whatis(1), man(1), mandb(8).

Wilf. (G.Wilford@ee.surrey.ac.uk).

       Fabrizio Polacco (fpolacco@debian.org).
       Colin Watson (cjwatson@debian.org).