wheel

[from slang `big wheel' for a powerful person] A person who has an active {wheel bit}. "We need to find a wheel to unwedge the hung tape drives." (See {wedged}, sense 1.) The traditional name of security group zero in {BSD} (to which the major system-internal users like {root} belong) is `wheel'. Some vendors have expanded on this usage, modifying Unix so that only members of group `wheel' can {go root}.

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