In the opinion of this community, what are the best linux/ubuntu references (online or print)? Let's say the best 5 - 10. Also, please categorize as to experience level. Personally, I am not a linux expert, but not a beginner either. The problem I have is too much information and it's scattered all over the intertubes.
I ask because I am about to do a fresh ubuntu re-install on one machine and also putting together another ubuntu machine to be a home server.
Basically, I do not desire to post each and every question that will come up. So, I'm looking for a comprehensive set of references so I can figure things out on my own. I already know about the ubuntu forums so please don't tell me about that.
Examples of what I want a reference(s) to provide: A good description of the linux file system. What exactly is /etc, /bin, and so on. Where do all the files/directories of my apps go? And more...