He would simply lean back and read it when logging onto the computer. One of the most important duties of a system's administrator is maintaining system security. This involves both passwords and computer viruses. Click here for more information about Logging On . Before going further we need to consider the makeup of commands.
Arguments generally involve what is being acted on.
They too may be optional. Neither of these commands takes an option. It has a weird variant who am i . If you don't know don't ask. If you use it without an argument you will get the same information as who presents plus some additional information.