This book covers every fundamental aspect of working with LINUX, Solaris, AIX, and HP-UX--the most popular flavors of UNIX. Chapters include coverage of Login and the common desktop environment (CDE), the file system and related commands, the Bash, Korn, and C shells, editing with vi, using e-mail, networking and the internet, advanced commands and UNIX tools such as sed, awk, and grep. The book contains an introduction to shell programming, system administrator commands that end-users have access to, plus information on built-in and add-on performance tools.