<keyword>with the keyword or expression to search for.
man -f <keyward>is the same as using the
<keyword>and print out the short descriptions of any found.
man -k <keyword>is the same as using the
<keyword>(as a regular expression).
$ man 3 printf
-aparameter will display the given command from all manual chapters
$ man -a printf
The below list gives the chapter numbers of the different categories of man pages:
A man page consists of several sections. Conventional section names include:
NAME, SYNOPSIS, CONFIGURATION, DESCRIPTION, OPTIONS, EXIT STATUS, RETURN VALUE, ERRORS, ENVIRONMENT, FILES, VERSIONS, CONFORMING TO, NOTES, BUGS, EXAMPLE, AUTHORS, and SEE ALSO.
infois the documentation format that the GNU Project prefers over
infowith no arguments displays an index of available topics.
info <keyword>will search all info files for the Topic given by
infopage is called a node
*) and ends with double-colons (
-h, some commands only use
–help, and many commands use both