How do you link objects so that they use the same materials? I was supposed to link duplicate objects but accidentally used the normal duplicate (shift+D) so changing the materials for all of them manually has become a pain. Does anyone know how to link objects that are already made so they share the same materials without joining the objects into a single one?

Thanks in advance,
Select all your objects, make sure that the last object you select is the one with the material you want to link over to the other ones. Than press Ctrl+L and link Materials
And you're all set.