Title: The Linux Philosophy for SysAdmins: And Everyone Who Wants To Be One, Author: David Both
Title: Using and Administering Linux: Volume 2: Zero to SysAdmin: Advanced Topics, Author: David Both
Title: Using and Administering Linux: Volume 1: Zero to SysAdmin: Getting Started, Author: David Both
Title: Using and Administering Linux: Volume 3: Zero to SysAdmin: Network Services, Author: David Both