Well, thats it - Welcome to Linux.
What distribution are you using?
You may need to install or configure X before being able to run a gui. In anycase try typing `startx` and pressing enter. If the command is not found then you need to install X and some GUI apps. If it trys to launch an X session, but then returns you to a prompt with some errors then you need to configure X, or maybe install some graphics drivers. If it works then great.
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