good tips for Unix

(1) http://freeengineer.org/learnUNIXin10minutes.html

(2) http://www.cs.usfca.edu/~parrt/course/601/lectures/unix.util.html

(3) SHELLdorado - your UNIX shell scripting resource

http://www.shelldorado.com/links/index.html#tutorials