What are the three sets of permissions for a file?

Unix and Linux systems define file permissions across three distinct sets: user (the file owner), group (members of the file's associated group), and others (everyone else). Each set independently holds read (r), write (w), and execute (x) bits, visible with 'ls -l'. This three-tier model is fundamental to Linux access control.

Administrator is not a Linux file permission category - Linux uses 'user' (owner) not 'administrator' as the first permission set.

'Standard user' is not a recognized Linux file permission category - the correct term for the owner's permission set is 'user'.

Neither 'administrator' nor 'standard user' are valid Linux file permission categories - these terms belong to Windows-style role concepts, not Unix permission sets.