> > - What do you think about it? > - Did you find it useful? > - Do you have any advices? > Yes, RHCSA is good start. You should buy this book: http://www.amazon.com/RHCSA-Linux-Certification-Study-Edition/dp/0071765654/ref=sr_1_1?ie=UTF8&qid=1389925859&sr=8-1&keywords=RHCE Eero, RHCE