Furthermore, logic-sim is a X-windows program, so you have an X-server program on your PC (or Mac)
The easiest way to use logic-sim is to log into one of the workstation in MathLab and work there. If you login DIRECTLY on a workstation (so you are physically in the lab), you can run logic-sim without doing anything special.
If you want to run logic-sim from home/dorm, then run further...