I'm reading this book right now too. It is sort of my bedtime reading. I've used Linux since 2000 and Solaris before that, and I do occasional C but mostly Ruby

I'm reading this book right now too. It is sort of my bedtime reading. I've used Linux since 2000 and Solaris before that, and I do occasional C but mostly Ruby/Python/Java. At first a lot of it was stuff I knew, but reading it still helped me make a few connections between things I was hazy on. One of my favorite parts was about process groups, sessions, and controlling terminals---it helped me understand shell job control and daemons a lot better. I also learned a lot of new nuances about signal handlers. Now I'm on SysV semaphores, and it has gotten a lot more interesting! I would definitely recommend this to anyone working on Linux systems. Even if you're using a higher-level language, I really think you get extra superpowers if you can go down the stack a few levels, and it is great for that. The author is one of the most thorough I've known. He gives you every caveat and detail. I don't think there is anything he pretends to know, but every statement feels verified.