This is a somewhat high level walkthrough of all Linux related security issues, from basic networking and operating system issues, to web server configuration and scripting language security. At about 500 pages that`s a tight squeeze, even for O`Reilly. Some of the coverage suffers, specifically I found the security information on PHP to be very scanty given the popularity of the language and how often web applications that use it are fraught with SQL injection vulnerabilities. That being said, the writing is excellent, and the coverage that is there, which is at a reasonable level of depth, is solid. In addition, security is something you have to work at, so having an introduction to get you down the road is probably a good idea anyway. I`d like to see the next version have deeper information on web server security, but in the meantime this is a solid walkthrough of Linux security.
