Now that we know everything is as it should be, let's go back up one level to the "animals" directory to do some more organizing. To change to your previous directory (also known as the "parent" directory), you need to use a special "argument" to the "cd" command. You would type cd .. Wherever you see "..", it refers to the directory above your current directory. In computer terms, the word "argument" does not refer to a disagreement, it refers to the "thing" which a command acts upon. In the example above, ".." is the argument to the "cd" command. In this case, the "thing" is a directory. You have actually been using arguments in most of the commands you have used so far. For example, in the "more cobras" command, "cobras" is the argument to the "more" command. The "thing" in this case is a file. Note that you always have to put a space between a command and its argument. Windows Command Prompt users might find this irritating, since Windows does not have this requirement. So, for example, Windows allows you to enter "cd..". Linux would give you an error message. Click the right arrow.