Glossary term
What is UID (User ID)?
UID stands for User ID.
The number the kernel uses for a user (or a group, GID) instead of its name.
Learn it properly · Linux & ShellLesson 1: Users, Permissions and OwnershipUsers and groups, reading rwx and octal modes, chmod and chown, sudo, umask, setuid in plain words, and common permission mistakes.