Arch Linux is a simple, lighweight Linux based distribution.
https://www.archlinux.org/
It follows a rolling-release model (current version is always up to date)
It provides a very comprehensive documentation within its wiki.
Arch Linux overview:
https://wiki.archlinux.org/index.php/Arch_Linux
Arch compared to other distributions:
https://wiki.archlinux.org/index.php/Arch_compared_to_other_distributions
Package Manager and Build System
pacman: a lightweight, simple and fast package manager
https://wiki.archlinux.org/index.php/Pacman
Arch Build System, a ports-like system to make it easy to build and install packages from source.
https://wiki.archlinux.org/index.php/Arch_Build_System
The goal of pacman is to make it possible to easily manage packages, whether they are from the official repositories or the user's own builds.
Arch Linux community
Code of conduct:
https://wiki.archlinux.org/index.php/Code_of_conduct
IRC channels: #archlinux in irc.freenode.net:
https://wiki.archlinux.org/index.php/IRC_channels
HOW TO INSTALL ARCH LINUX
Arch Linux FAQ:
https://wiki.archlinux.org/index.php/FAQ
Getting Arch:
https://wiki.archlinux.org/index.php/Category:Getting_and_installing_Arch
https://www.archlinux.org/download/
USB flash installation media:
https://wiki.archlinux.org/index.php/USB_flash_installation_media
Install Arch Linux on an USB key:
https://wiki.archlinux.org/index.php/Installing_Arch_Linux_on_a_USB_key
Installation guide:
https://wiki.archlinux.org/index.php/Installation_guide
Install Arch Linux from VirtualBox:
https://wiki.archlinux.org/index.php/Installing_Arch_Linux_from_VirtualBox
System maintenance
System maintenance:
https://wiki.archlinux.org/index.php/System_maintenance
Improving performance:
https://wiki.archlinux.org/index.php/Improving_performance
General recommendations:
https://wiki.archlinux.org/index.php/General_recommendations