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People who use laptops often need different configurations. They may want the option of removing their external display, docking station, or other peripheral. In some cases, like with network cards, it's quite easy and normally the user doesn't need to modify anything. In some cases the user needs to execute some commands to modify the default behavior. Normally when you need to re-execute the same command twice it's time to write a script and put it in the right place to be executed in the right moment.