hiddenknight821 wrote: » You're really lucky you got the latest RHEL book from Sybex. It just came out last month. From that book, you probably only need to know the Red Hat package manager (rpm) and the update manager (yum), which are used on Red Hat based distributions such as Fedora, CentOS, and Scientific Linux. Looks like you're progressing well. I'm still learning new things even after my third Linux/Unix book, which is the fun part.