I originally bought this book as a sytems administrator's reference. I was disappointed by the lack of depth provided on most topics, and the poor job done indexing.For example, I ran into an issue where I needed some refresher information on the /etc/X11/xorg.conf file. I found a single page of basic descriptive information on p134 compared to the in depth information provided by an out-of-date Sam's Fedora Unleashed (Ball and Duff).I only recommend this book as an orientation to those newly learning Linux/RedHat/Fedora. The book does do a good job of providing links and references of where to obtain further information on many topics.