Sometimes a term is defined in multiple sections of the manual. By default, man
will only display the first page it finds, which can be annoying for programmers because C functions are documented in a later section than commands and system calls. Use the following to display all pages that match a name:
$ man -wa printf
/usr/share/man/man1/printf.1.gz
/usr/share/man/man1p/printf.1p.gz
/usr/share/man/man3/printf.3.gz
/usr/share/man/man3p/printf.3p.gz
To view the page from a specific section, simply place it before the term:
man 3 printf