问题 I have a process that requires me to identify different machines, and I'm not sure what's the best way to do it. I do not want to save that ID on a text file or something, but I want to generate it from hardware every time I need it (in case the text with the ID gets deleted or something) I've checked UUID, and it seems ok but I'm not sure. I've taken a look at uuid.getNode() , but I have 2 problems with it: One part says "If all attempts to obtain the hardware address fail, we choose a