.6 File Extension
Unix Section 6 Manual Page
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What is a 6 file?
A 6 file contains a manual page (man page) accessible via the Unix man utility. It describes a game or other niche program available in a Unix-based operating system. 6 files are named for the program they describe.
Most Unix-based operating systems include a system manual divided into eight numbered sections. The sixth section of this manual includes documentation of games, screensavers, and other "funny little programs" included in the operating system. Each program's documentation is saved in a separate 6 file.
NOTE: Other sections' Unix man pages use the .1, .2, .3, .4, .5, .7, and .8 extensions. Man pages are also commonly compressed into .GZ files (which may use the .gz.# extension).
How to open a 6 file
In Unix-like OSes, you can open a 6 file by calling the man utility using the name of the file. For example, to open game.6, enter man game(6).
Since 6 files are plain text files, you can also open them in any text editor, such as Vim (Linux, Mac), Microsoft Notepad (Windows), and Apple TextEdit (Mac).