I’ve already done an article called Usenet for Dummies, where you can learn about what exactly Usenet is. Go read that article if you haven’t already. If you have, then this article will go over a variety of tools you need to get up and running with Usenet on Linux.
Usenet is a world-wide distributed Internet discussion system. Basically, think of a forum. Usenet has “groups” that people can go to and read/post information to. The groups represent the categories a forum might have. Only Usenet is humongous and is distributed world-wide.