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|