Arch Linux is an i686-optimized Linux distribution based on ideas from CRUX. It is lightweight and contains the latest stable versions of software. Packages are in .tar.gz format and are tracked by a package manager that is designed to allow easy package upgrades. Arch is quite streamlined compared to some other distributions. A default Arch install leaves you with a solid base; from there, you can add packages to create the custom installation you’re looking for.