In one of our undocumented wiring closets we've got a fiber optic converter going straight into the patch-bay. When I tested the patch bay with a basic patch cable tester it claimed the other end of the patch-bay was home to a computer (as opposed to networking hardware). So now I want to find that computer out of the 50 other computers in this building to see if it is still in use. (Without documentation, you run the risk of leaving things on that don't really need to be on anymore...) So I was wondering if I could just take my laptop in there with a crossover cable and run some script to probe the other machine to see what OS it is running, and perhaps what its IP address is. any tips?