This is a single, comprehensive resource that responds to the high demand for specialists who can provide advice to users and handle day to day administration, maintenance, and support of computer systems and networks. The author approaches both network and system administration from the perspective of the principles that do not change on a day to day basis. He shows how to discover customer needs and then use that information to identify, interpret, and evaluate system and network requirements. The new coverage includes Java services and Ipv6.