The computer automatically shuts down from the main computer

i have noticed when i use the computer on internet cafe that the computer shuts down automatically when i am done using it. although we have to turn it on, using the button on the ocmputer itself. but when they need to shut down, the main computer where the cashier is , they can shut it down. and so i am thinking if i can do that in my own computer. so i guess it is called networking. but i don't know how to do that. i am just curious though.