What this book is not
One of the ways we have tried to fulfill our vision for this kind of uniquely useful book is by being extremely careful about what’s included. We’ve tried to cut out everything that isn’t essential to your life as a developer, or to a basic understanding of Linux and its core abstractions. In other words, the reason this book is useful is because of all the things we left out.
This book is not a full Linux course. It’s not for people working as Linux system engineers or kernel developers. Because of this, it’s not 750+ pages long, and you should be able to work through it in a few days, perhaps during a quiet sprint at work.