So You Can't Get a License

Before doing anything else, see if you can telnet to knave or encore (without any qualifications.). If you can't, then you should add knave and encore to your /etc/hosts file. The lines you need to add are:

128.2.236.76 encore.ece.cmu.edu encore 128.2.236.90 knave.ece.cmu.edu knave

If you can telnet directly to knave and encore, then you need to contact an instructor for help.