Arch Linux is a Linux distribution for computers with x86-64 processors. Arch Linux adheres to five principles: simplicity, modernity, pragmatism, user centrality and versatility. In practice, this means the project attempts to have minimal distribution-specific changes, minimal breakage with updates, pragmatic over ideological design choices, user-friendliness, and minimal bloat.
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, meaning there are no “major releases” of completely new versions of the system; a regular system update is all that is needed to obtain the latest Arch software; the installation images released every month by the Arch team are simply up-to-date snapshots of the main system components.