Choosing a Unix System Administration Textbook?

Smantha writes "I recently began teaching a Unix System Administration course at a community college. The previous instructor was using a very outdated textbook, and I'm trying to find one that is a bit more advanced and useful for my students. They are required to take a 100-level Unix class before this one and are familiar with the basics of using the command line. I'm looking for something that covers topics such as OS installation, software/package installation, user management, system administration tools, troubleshooting techniques and tools, service configuration (network services, for example) and some miscellaneous topics such as compression/archive tools, grep, make, and the like. What books have you found to be good references on your desk? What books have been good for learning these sorts of topics?"