New ask Hacker News story: How do I study operating systems(CS subject) as a Linux systems administrator?

How do I study operating systems(CS subject) as a Linux systems administrator?
3 by shivajikobardan | 2 comments on Hacker News.
As I said I've my FE license coming up as well as I'm a Linux Systems Administrator. Now, I want to learn operating systems(a cs subject) from the depth of it. I'm following 3 different books (I hate tanenbaum) - William Stallings - Deitel et al - Galvin et al Out of them deitel is best. But my goal is to learn each line written in the book and I'm not satisfied with myself. I want to gain a lot of knowledge. But it's not happening. Please guide me a bit.