• manual — руководство

$ man ls

1. USER COMMANDS
2. SYSTEM CALLS
3. C LIBRARY FUNCTIONS
4. DEVICES AND NETWORK INTERFACES
5. FILE FORMATS
6. GAMES AND DEMOS
7. ENVIRONMENTS, TABLES, AND TROFF MACROS
8. MAINTENANCE COMMANDS
9. X WINDOW SYSTEM

$ man crontab

$ man 5 crontab

$ man 1ssl passwd

$ zcat /usr/share/man/man1/cat.1.gz | groff -man -Tascii

$ man -M /usr/local/rancid/share/man cloginrc
$ groff -man -Tascii /usr/local/rancid/share/man/man1/clogin.1 | less

$ whatis crontab

$ man -k password

$ find /usr/share/man/ru

NAME
SYNOPSIS
DESCRIPTION
ENVIRONMENT
EXIT STATUS
SEE ALSO

• гипертекстовое руководство info

$ info ls

...
 Also see *note Common options::.
...