From FarmShare

Using Mathematica on Farmshare:

1. I ssh with X11 forwarding:

 ssh -X chekh@corn.stanford.edu

1. I load Mathematica env vars:

 module load Mathematica-8.0.4

1. I check which mathematica that points me to:

 which mathematica

1. I run mathematica GUI:

 mathematica

If you get a licensing error, check if you have a file ~/.Mathematica/Licensing, if you have a 'mathpass' file there, delete it.