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root: n. 1. [Unix] The superuser account (with user
name ‘root’) that ignores permission bits, user number 0 on a
Unix system. The term avatar is also used. 2. The top node of the system directory structure; historically the
home directory of the root user, but probably named after the root of an
(inverted) tree. 3. By extension, the privileged system-maintenance login on any OS.
See root mode, go root, see
also wheel.
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