/usr/lib/dvi2ps/PS720-bluesky is in dvi2ps 5.1j-1ubuntu1.
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 7 | # dvi2ps font description file for printers 720 dpi
#
# printer spec
fontdesc printer/PS720
# font selection
fontdesc vflib-bluesky
fontdesc fonts$kpse/generate
|