Hack notes, Linux and Unix Security, Portable reference

The goal of the book is to educate you how to protect your system by showing how crackers use known methods to break into your system and best
practices in order to defend your system. The book has been written around the concept that you need to think like a cracker to be able to react
properly against the security threats. The idea is that if you know how a cracker proceeds to crack your system, this will help you to implement the
right measures to secure your system.