Setting things up on Linux

1. Get and build the code

Much instruction on this is in the User Docs

2. Start programming

Ha ha, only joking (but seriously, you could just go and edit the code with vi or emacs or something, it's all in the OpenSim directory). However, some people like to use an IDE. The best one on Linux is probably [Monodevelop http://www.monodevelop.com/Main_Page]. You should be able to load the OpenSim.sln file sitting in the root OpenSim directory into this.