The Debian Administrator’s Handbook，这本书是debian的两个开发者写出来的，电子版免费发布，实体版要50多欧元，并且将保持更新，想玩BackTrack的可以读一读，毕竟BackTrack是从Debian改过来的，新书发布的捐款活动Backtrack小组可是捐了1000欧元呢，中文版开始汉化了。
This book, written by two Debian developers, is a welcome addition to any administrator’s bookshelf. Debian is very popular on servers and it’s also the base distribution from which BackTrack is forged. Security is not in rest in this book since a full chapter is dedicated to the topic. It covers setting up a firewall, monitoring, intrusion detection systems, setting up SELinux policies, dealing with a compromised machine, and gives many thoughful advice to define a security policy within your organization.