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Under the hood means something that is hidden under the surface of a complex system. If you need to look under the hood of something you are investigating its internal workings.
This idiom is used most commonly to talk about hidden details of a system, software or an organization. It draws from the image of opening a car's hood to look at the engine.
This idiom is used most commonly to talk about hidden details of a system, software or an organization. It draws from the image of opening a car's hood to look at the engine.
Under the hood, it is running linux.