1) Laboratorio de Comunicaciones Digitales, Universidad Nac. de Cordoba, Argentina. 2) Educational. 3) http://lcd.efn.unc.edu.ar 4) All but one of the 10 machines in the lab are running Debian the other runs RH6.0. Two are running Sarge and the rest Woody. Three of them are laptops. We use Debian for every day work, (internet, office tasks, programming, etc.) and we are also running an Openmosix cluster (laptops included) to run our simulations.