The book Linux Administration provides hand-on practice on Linux operating system. The book covers some core areas from administration point of view, such as roles and duties of the system administrator, maintenance and management of system configuration files, network administration, configuration mail services, and Web server. It provides numerous examples in an easy-to-understand language along with exercise at the end of each chapter. Beside the examples the book also provides a separate lab section that reader can use to check and enhance his/her practical skills on Linux.