I learned mostly thru trial and error with Linux as a teenager, but during my CS degree this course filled in some missing gaps:http://www.cl.cam.ac.uk/teaching

I learned mostly thru trial and error with Linux as a teenager, but during my CS degree this course filled in some missing gaps:http://www.cl.cam.ac.uk/teaching/2005/UnixTools/ http://www.cl.cam.ac.uk/teaching/2005/UnixTools/