In Unix-like operating systems, a user identifier (often abbreviated to user ID or UID) is a value used to identify a user. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access.
In Unix-like operating systems, a user identifier (often abbreviated to user ID or UID) is a value used to identify a user. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access.
Source: Wikipedia "User identifier" · CC BY-SA 4.0
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