"No one cares if you can back up — only if you can recover." This is probably the most important point in this book. Using a variety of open source tools, you are shown how to back up, test, and restore your Windows, Macintosh, Unix, or Linux systems, including file system and database backups. There is even a chapter that will help guide you in choosing a commercial alternative if the open source solutions don't meet your needs.
This is not a book for the beginner. It is aimed at professional systems administrators, although it contains useful information for anybody who needs backups. You should be comfortable with using command line tools and the shell. Having said that, the author (W. Curtis Preston) does an excellent job of explaining the various tools and concepts he presents. There are lots of examples given, and the most fun parts of the book are the real world examples of back-ups gone wrong.
The first two chapters provide an introduction to the concept of the book and basic back-up principles. You are shown why back ups are necessary and what should be backed up. Preston explains his philosophy of backing up the entire system, excluding what's not necessary, and automation. There are a lot of eye-openers in the beginning chapters, and they should not be missed.
Basic tools such as cpio, dump, dd, tar and rsync for Unix and Linux systems, ditto for Mac OS, and ntbackup and System Restore for Windows, are covered. The book continues on with more advanced tools such as Amanda, BackupPC, and Bacula. Bare metal recovery - restoring the entire system from the operating system on up - is also explained. The reader is walked through each program, with ample explanations and examples given.
Commercial software and hardware are covered. The author has chosen to not suggest specific utilities, but rather gives guidance on how to choose a back-up solution that will meet your needs. The reasoning is that there are so many programs available that are constantly changing that a specific recommendation will soon be obsolete. It seems to be the "if you teach a man to fish" technique. If you are shown what to look for in a back-up utility, you can see for yourself the benefits of the various programs available.