GNU/Linux Manual Pages

• man 1  User commands that may be started by everyone.
• man 2  System calls, that is, functions provided by the kernel.
• man 3  Subroutines, that is, library functions.
• man 4  Devices, that is, special files in the /dev directory.
• man 5  File format descriptions, e.g. /etc/passwd.
• man 6  Games, self-explanatory.
• man 7  Miscellaneous, e.g. macro packages, conventions.
• man 8  System administration tools that only root can execute.
• man 9  Another (Linux specific) place for kernel routine documentation.