/usr/lib/mime/packages/util-linux is in util-linux 2.20.1-5.1ubuntu20.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | text/plain; more %s; needsterminal; priority=5
text/*; more %s; needsterminal; priority=1
|