This chapter discussed the procedures for adding and removing user and groups. You should be able to do these tasks using the provided scripts and by hand, should the need arise. Additionally, you should know what the various parts of adding a user do, techniques for selecting a password, and how to change user information. Finally, you should know how to shut down your computer properly and why it is important to do so. These are all important parts of administering a system whether it is your home computer or a large network server.