As a backend developer, I have been "collecting" knowledge about Linux throughout all my professional career, just finding the way to do this or that according to the circumstances.
I started this book with the hope of putting in order my ideas, and I can say that I accomplished the mission.
During the first chapters I had the impression that the content could be too basic, but the topics add complexity as the book progresses. Also, I can say that even in the first chapters I ended up every section with at least something interesting learned.