Alright, this book has some strong points and some weak points. The weak points are: There are only general guidlines to troubleshooting but nothing else. The reference links work, but some are expired. The coverage is "hasty" and kind of sloppy, but in a book like this that is to be expected.
The strong points are: It virtually covers all the areas. It gives you a solid idea on how Linux works and lets you take it from there. It offers enough support to specialized issues such as networking, scripting, and kernel managing. (Again don't expect any in depth troubleshooting, if any at all).
The message is clear: If you want a most general introduction to ALL areas of Linux, buy this book.
If you want the newbie's guide to Linux, this is not it! Chances are that you'll get stuck booting for the first time with weird messages appearing on your screen and this book will not care less! Stay clear in that case and buy someting more limited to its scope but more embracing to troubleshooting.
On the other hand if you are not experienced yet and you want a thick book on your shelf as a guick reference to kernel compilation let's say, then buy this book. As your experience grows your references to this book will diminish. Mind you there are AMAZING online resources about anything you might need in Linux. Some other popular company in PCs and workstations should be ashamed by its database poverty and limited information sharing ;-)
