/usr/lib/mime/packages/texlive-base is in texlive-base 2015.20160320-1ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | application/x-dvi; /usr/bin/xdvi %s; description=TeX DVI; test=test -n "$DISPLAY"; nametemplate=%s.dvi; priority=5
# entry for dvi2tty
# "-q" to not pipe through a pager. run-mailcap or similar will do
# that, or not, as appropriate.
# priority=3 is the same as "catdvi".
application/x-dvi; /usr/bin/dvi2tty -q %s; copiousoutput; description=TeX DVI; priority=3
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