The Linux implementation of Swift currently only runs on Ubuntu 14.04 or Ubuntu 15.10. For our application, I’ll be using Ubuntu 14.04.3. If you don’t have an Ubuntu server sitting around you can always spin one up on your hosting provider of choice (Looking for one? Check out DigitalOcean or Linode). The Swift GitHub page shows you how to build Swift manually but you may want to start writing code without having to wrestle with Linux. Fortunately Apple provides snapshots that you can download and get running with a quickness.