Manual sections
The manual is generally split into eight numbered sections, organized as follows (on BSD,
Unix and Linux):
Section Description
1 General commands
2 System calls
3 C library functions
4 Special files (usually devices, those found in /dev) and drivers
5 File formats and conventions
6 Games and screensavers
7 Miscellanea
8 System administration commands and daemons
Unix System V uses a similar numbering scheme, except section 4 is file formats, section 5 is
miscellany and section 7 is special files.
On some systems some of the following sections are available:
Section Description
0 C library header files
9 Kernel routines
n Tcl/Tk keywords
x The X Window System