This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Which UNIX? Or do you mean Linux? The best way to learn is to play with it: install Linux in a VM on your PC. Or go with dual-boot. Look up Linux tutorials on the web or better yet et a book on the version of UNIX/Linux you will be using.