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man page sections
Lecture Overview Index | Linux SysAdmin Homepage
From man 7 man on a Linux System:
The manual sections are traditionally defined as follows:
- 1 Commands
- Those commands that can be executed by
the user from within a shell.
- 2 System calls
- Those functions which must be performed
by the kernel.
- 3 Library calls
- Most of the libc functions, such as
qsort(3))
- 4 Special files
- Files found in /dev)
- 5 File formats and conventions
- The format for /etc/passwd and other
human-readable files.
- 6 Games
- 7 Macro packages and conventions
- A description of the standard file system
layout, network protocols, ASCII and
other character codes, this man page, and
other things.
- 8 System management commands
- Commands like mount(8), many of which
only root can execute.
- 9 Kernel routines
- This is an obsolete manual section. Once
it was thought a good idea to document
the Linux kernel here, but in fact very
little has been documented, and the docu-
mentation that exists is outdated
already. There are better sources of
information for kernel developers.
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