This text shows how to achieve continuous availability of services - the goal of every network and systems administrator. It covers: selecting hardware and software that will help avoid installation and reliability problems; planning and executing Linux installation; understanding the Linux boot process, the configuration files and the key startup files; providing remote access to applications through TCP/IP and PPP to applications like rlogin and telnet; configuring BIND version 8 to provide DNS; creating a custom internet mail service with sendmail; implementing mailbox services with POP3 and IMAP; administering the DHCP and BootP servers to provide automatic TCP/IP configuration for clients; sharing files and printers through the Samba server, the NFS server, and the line printer daemon; using route, routed and gated to implement static and dynamic routing, and ipchains for address masquerading; securing Linux server with the system"s built-in security features; planning and executing a Red Hat 6.0 Linux installation; upgrading the Linux 2.2 kernel and troubleshooting the Linux network; keeping systems and networks up and running 24 hours a day, 7 days a week, 52 weeks a year, with the 24seven series.