http://ru.wikipedia.org/wiki/Man

Структура, поиск, выход

• 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 -M /usr/local/rancid/share/man cloginrc
• groff -man -Tascii /usr/local/rancid/share/man/man1/clogin.1 | less
• zcat /usr/share/man/man1/cat.1.gz | groff -man -Tascii

• whatis 2303

NAME
SYNOPSIS
DESCRIPTION
ENVIRONMENT
EXIT STATUS
SEE ALSO