Proper Way to use lxc-copy -- Absolute Beginner question

I’m trying to use lxc-copy like so: lxc-copy -n container_name -N newContainerName. I have also used the same command but with the -P system_path_to_container_name and -p system_path_to_new_container_name flags set. In all cases the command completes with no output, and looking at where my containers are stored, I can see absolutely no changes. It’s like nothing happened.

Is this the right way to use ‘lxc-copy’? Looking at the manpages has been confusing and I can’t see anything special that might help me, probably because I’m inexperienced at this. How do I use lxc-copy to clone a container? Is there another way to clone a container that I don’t know about?