I have been using Ubuntu since 9.04, and it became my primary OS in less than a year. By now I have so much experience in Linux and robotics that according to several people, including a software engineer, I am now a local expert. I have a blog now, and have posted information on writing shell scripts that, for example, wait for you to leave your computer, then say "Are you still there?" like a turret from Portal, among other things.