Encyclopedia > UNIX manual
UNIX manual
To read a page from the manual, one can use the command
$ man [<section>] <page_name>
at a shell prompt, e.g. "man ftp" (the section number can usually be omitted). Pages are traditionally referred to using the notation "page_name(section)", e.g. ftp(1).
The section number is used to allow a specific manual page to be chosen when there are multiple manual pages with the same name. This can occur when the names of system calls, user commands, or macro packages[?] conflict. Two examples are man(1) and man(7), or exit(1) and exit(3).
Manual sections
The manual is generally split into eight numbered sections, organised as follows:
| Section | Description |
|---|---|
| 1 | General commands |
| 2 | Low-level system calls |
| 3 | C library functions |
| 4 | Special files (usually devices, those found in /dev) |
| 5 | File formats and conventions |
| 6 | Games |
| 7 | Miscellanea |
| 8 | System administration and associated commands |
On some systems some of three other sections are available:
| Section | Description |
|---|---|
| 9 | Kernel routines (obsolete) |
| n | Tcl/Tk keywords |
| x | The X Window System |
The manual pages are stored as nroff source files. Most versions of man cache the formatted versions of the last several pages viewed.
For an example of a man page see chmod.
External links
- http://www.foldoc.org/man.cgi : Internet gateway to Linux's man command
This article was originally based on material from FOLDOC, used with permission. Update as needed.
All Wikipedia text is available under the terms of the GNU Free Documentation License
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