/usr/share/mate/autostart/mate-hud.desktop is in mate-hud 18.04.8-0ubuntu1.
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 | [Desktop Entry]
Type=Application
Name=MATE HUD
Exec=/usr/lib/mate-hud/mate-hud
NoDisplay=true
StartupNotify=false
Terminal=false
X-MATE-Autostart-Delay=5
|