/usr/share/applications/libertine.desktop is in libertine 1.0.0+16.04.20160411-0ubuntu1.
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 8 9 10 11 | [Desktop Entry]
Version=1.0
Name=Libertine
Comment=Legacy Application Sandbox
Exec=libertine
Terminal=false
Type=Application
Icon=/usr/share/libertine/libertine_64.png
Categories=
GenericName=Application Sandbox
X-Ubuntu-Touch=true
|