The Linux man-pages project documents the Linux kernel and C library interfaces that are employed by user programs. It provides manual pages in the following sections:
(Note that many of the man pages on a Linux system, especially those in sections other than 2 and 3, come from other packages.)
For information on downloading the latest version of man-pages, look here.
You can browse the manual pages online here.
If you find a bug in a man page, then please report it.
If you want to contribute to work on man-pages, have a look here.
For a list of changes in various man-pages releases, see the changelog.
For information about translations of man-pages, take a look here.
The man-pages maintainer is Michael Kerrisk (mtk in the changelog; mtk.manpages-AT-gmail.com; blog).