I don't know how many times I've pointed people to HOWTOs.. I feel like a jerk because I seem to be the only one doing it. I learned from jacking with linux and reading HOWTOs along with other people's input, but I always searched the HOWTO database first.
Linux is a very good learning tool if you take advantage of it. Take it seriously and don't slime through it and it can pay off in your career.
Linux HOWTOs -->
http://www.tldp.org