Quick Tip: Untrusted application launcher
If you copy your shortcuts from one system to another and you don’t preserve the right attributes on this files then is possible to get a warning everytime when you run a application from your desktop or your menus.
This shortcut should be a *.desktop file and it should have your rights on it or it should have minimum read and execute for group or others.
to fix that just run
sudo chmod ugo+rx *.desktop
That means you give rx rights (read and execute) to ugo (user, group and other).
So now, you also learned how to set the proper file rights 🙂
I know you can also use mark as trusted button, but is very useful when you have more than 40 shortcuts on your desktop.