Many computer users have an insatiable appetite to deepen their understanding of computer operating systems and computer software. Linux users are no different in that respect.

The Linux man-pages project documents the Linux kernel and C library interfaces that are employed by user programs.

The Linux Documentation Project - LDP for short, or tldp (taken from the domain name) - is a very long-standing project whose aim is to document all aspects of the GNU/Linux operating system and associated applications software. The Project is governed by the LDP Manifesto and has a long history.