now out of date, questionable accuracy even when it was new

This book covers linux kernel version 2.2, kernel version 2.4 is not covered. There are trivial comments at the conclusion of each chapter "looking ahead to 2.4" which are nearly worthless.
There is no worthwhile discussion of ACLs (access control lists).

Worst of all, even when the information was current it was of questionable accuracy. In the chapter discussing the VFS on page 334 there is a list of fields in the superblock object. Then compare this list to the list of the fields in the chapter discussing the ext2 filesystem superblock on page 499 and you will see great differences. Why is this?

O'reilly needs to update this book. It's a good start, now finish it.

Other Reviews

• Pretty good, but could be better
• Great explanation of design
• now out of date, questionable accuracy even when it was new
• Helped me get started on the Linux kernel
• simply the best