I've been teaching CS for more than twenty years in Italy... mostly C, C++, Java, PHP, bash and general topics. Recently I "met" Ruby and Rails and I'm trying to learn it from the ground up.
I started using Linux back in 1996, and from about 1998 it' my main OS. I've been using Redhat, Suse, Debian before switching to Ubuntu in 2007.
I speak Italian, English, German, French, Japanese in this order of expertise.