man flags & options

-k, --apropos

Search manual page descriptions for a keyword.

man -k compress

man -k "copy files"

-f, --whatis

Show a one-line description of a command.

man -f ls

man -f printf

Section numbers (1-8)

Open the manual page from a specific section.

man 1 printf

man 5 passwd

man 3 malloc

-a, --all

Show all matching manual pages in succession.

man -a printf

-w, --where

Print the location of the manual page file instead of displaying it.

man -w ls

man -w 3 printf