Makeuseof posted a tutorial about creating your own music stream with Icecast under Linux  

There are a handful of people who find creating their own streams a useful thing to do, for whatever reason they want or need. Ever since the YouTube era started video streaming has been hot and music/audio streaming is still a pretty common thing to find. The process in Linux, though pretty easy for basic configuration, is somewhat lengthy.

  How To Create Your Own Music Stream With Icecast