It's all true, I have worked most of my time with Microsoft Network System and I'm seriously planning to get the best experience that I can on Unix system, First I'll need to get one of the Unix Os and after get those books you've talked to me about. I've already took a course in AIX but it was for very basics commands... Maybe the self-paced way is the best way, like you say experiences as no replacement. Thanks to you Neo. Your experiences are well appreciated here.