FreeBSD Handbook
http://www.techbooksforfree.com/index.shtml The FreeBSD newcomer will find that the first section of this book
guides the user through the FreeBSD installation process and gently
introduces the concepts and conventions that underpin UNIX. Working
through this section requires little more than the desire to explore,
and the ability to take on board new concepts as they are introduced.
Once you have traveled this far, the second, far larger, section of the
Handbook is a comprehensive reference to all manner of topics of
interest to FreeBSD system administrators. Some of these chapters may
recommend that you do some prior reading, and this is noted in the
synopsis at the beginning of each chapter.