/usr/share/applications/debian-installer-launcher.desktop is in debian-installer-launcher 19.
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 | [Desktop Entry]
Version=1.0
Name=Install Ubuntu saucy
Comment=Install this system permanently to your hard disk
Exec=su-to-root -X -c /usr/sbin/debian-installer-launcher
Icon=debian-installer-launcher
Type=Application
Categories=Application;System;
StartupNotify=true
Terminal=false
|