Sams Teach Yourself UNIX System Administration in 21 Days is designed to take you in 21 days from beginner or intermediate to the capability level of performing intermediate-level system administrator functions. Even advanced UNIX users who are interested in learning system administration will benefit from this book. Written by a system administrator offering peer-to-peer instruction, this book teaches real world, practical skills that every system administrator needs to know such as machine configuration and server maintenance. Topics include: Complete, step-by-step installations, Compiling and installing software, Networking machines, Providing Internet services, Securing the system against intruders, and Providing cross-platform connectivity.