/usr/share/applications/texdoctk.desktop is in texlive-base 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 4 5 6 | [Desktop Entry]
Name=TeXdoctk
Exec=texdoctk
Type=Application
Terminal=false
Categories=Settings;
|