I did "man copy_to_user" - It shows some kernel help text. It belongs to section 9. Now I would like to know ,whether is there way to display all function belongs to this section 9.

  • All functions that belongs to all software on section 9?..
    – pauska
    Jun 23, 2011 at 13:00
  • Yes,list all functions that belongs to section 9. I'm interested in functions.I can see them under /usr/share/man/man9 . But would like to know anyother better way to list them. Jun 23, 2011 at 13:12

1 Answer 1


whatis -s 9 -w "*" will list the name and descriptions of all the manpages it knows about (uses the mandb database) in section 9. Be sure to quote the * character.

  • It says unknown option. [laks@space ~]$ whatis --version whatis from man-1.6f [laks@space ~]$ whatis -s 9 -w "*" whatis: -s: unknown option Jun 23, 2011 at 14:34
  • I've got whatis 2.5.7 which is in debian stable's man-db 2.5.7-8 package. Even oldstable has 2.5.2. Check man whatis and see if your version has some other way of specifying section and wildcard matches.
    – DerfK
    Jun 23, 2011 at 16:03

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