This book is loaded with helpful information that will clearly and concisely explain the fundamentals, and other advanced topics, of Linux. When I started using Linux, I had a ton of questions about the kernel and file system, and I couldn't seem to find many answers on the web. This book told me everything, without the pretentious terms of a veteran administrator, that I needed to know in order to really get a firm grasp on how Linux works. I highly recommend this book to anyone whom is either simply curious about Linux, a new user, or whom is a seasoned user looking for good reference material.