Arch Linux is lightweight, flexible, simple and aims to be very UNIX-like. A minimal environment (no GUI) compiled for i686/x86-64 architectures is provided upon installation: rather than tearing out unneeded and unwanted packages, the user is offered the ability to build up from a minimal foundation without any preemptively-chosen defaults. Arch's design philosophy and implementation make it easy to extend and mold into whatever kind of system is required, from a minimalist console machine to the most grandiose and feature-rich desktop environments available: it is the user who decides what his Arch system will be.
Arch is backed by pacman, an easy-to-use binary package manager that allows you to upgrade your entire system with one command. Pacman is coded in C and designed from the ground up to be lightweight, simple and very fast. Arch also provides the Arch Build System, a ports-like system to make it easy to build and install packages from source, which can also be synchronized with one command. You can even rebuild your entire system with one command.
Supporting i686 and x86-64 architectures, Arch's Official Repositories provide several thousands of high-quality packages to meet your software demands. In addition, Arch encourages community growth and contribution by offering the Arch User Repository, which contains many thousands of user-maintained PKGBUILD scripts for compiling installable packages from source using the makepkg application. It is also possible for users to easily build and maintain their own custom repositories.