Linux is a free and open source operating system. It comes in many flavours.
We have wiki pages about various flavours of linux, giving generic information, tips/tricks/software links relevant to OpenStreetMap:
Additionally the Software/Desktop page lists applications by their target desktop operating system.
|Operating systems based on GNU/Linux kernels|
|Android | Arch | Debian | Fedora | Firefox OS | Gentoo | Mandriva | Mint | Red Hat | sidux | Slackware | SuSE | Ubuntu|