"A unique book - this will teach you practical knowledge that you otherwise only obtain by much hard experience. If I could give a new administrator one piece of advice, it would be: read this book."
"I recommend this for anyone that is responsible for systems that hold data: it teaches you how to think about security, so that you won't get lost in the hype and hackery of the IT security world."
"Linux is now both "network duct tape", and one of the main application server platforms. If you don't already know how to manage Linux systems, this is probably the best book to help you begin."
"Your second book on Ruby, and one that you'll keep coming back to. When you need to develop a solution to an annoying problem, start by checking this book."
