Anyone who needs to become familiar with a UNIX-based operating system will find this Web site very valuable. Through a series of ten key lessons, the user will learn the basics of logging in and browsing the directory structure as well as more advanced concepts such as networking utilities and system administration. Following step-by-step procedures, users can practice fundamental operations without worrying about getting lost. At the end of each lesson, an assignment is given to let users try a similar exercise on their own. A bulletin board is available for people to exchange advice and ideas with other UNIX users.