Whether you login using the GUI or a character console, the way you interact with a Linux system is essentially the same. You must first be able to identify yourself to the system by providing the appropriate information. This information is your user name or login name and a password. As we discuss in other sections, by default Linux will prompt you for this information when the system is started. Once you have correctly identified yourself, you are given access to the system. What happens next will depend on whether you are using the GUI or a character console.
For simplicities sake, we will first talk about interacting with a system from a character console, which can also be referred to as a character terminal. One important reason for this is that even if you are using a GUI, you still have access to a character terminal window and the way you interact is the same. Also, when you connect to a remote system (i.e. using something like telnet) the way you interact is the same as well.
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