privilege to root using only privileged ports (ports 1 through 1024).root user to change the owner of a file. When the option is disabled, the owner of a file can change its ownership without being root.When a non-root user changes the owner of a file, the set-user-ID and set-group-ID bits are cleared. If a non-root user tries to change the owner of a file but the change would cause the file's recipient to exceed their quota, the attempt will fail.