/var/lib/tex-common/fontmap-cfg/texlive/texlive-lang-polish.cfg is in texlive-lang-polish 2017.20180305-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | MixedMap ccpl.map
MixedMap plother.map
MixedMap pltext.map
|