The design approach of the development team focuses on simplicity from a developer's standpoint rather than a user's standpoint, elegance, code correctness, and minimalism. A package manager written specifically for Arch Linux, pacman, is used to install, remove and update software packages. Arch Linux uses a rolling release model, such that a regular system update is all that is needed to obtain the latest Arch software; the installation images released by the Arch team are simply up to date snapshots of the main system components.
Arch Linux - Wikipedia, the free encyclopedia
How to install Arch Linux, while keeping it simple | Muktware