LED on a simple breadboard and interfacing it with intel atom processor with linux

I have got a LED on a simple breadboard and I want to interface it with intel atom processor which is installed with LINUX. So, how should I go with it ?

May be a device driver ? ( but how to do it )

Or , Direct commands ? ( HOW )

Please explain in detail . THANKS
How does the breadboard connect to the intel atom processor? This detail will determine the software solution.
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