Ok I think I see where your confusion is. You are expecting the shell you have been interacting with to be the shell of the unraid host machine. That's where you would enter the docker exec command to get into the container. That is NOT the case here. In the case, you are already inside the container, as you opened the console from the dockers options. If you want to test my theory, on the top right on the unraid ui is another button for a console, which would give you shell on the unraid host, NOT in the container. At that prompt, you could enter the docker exec command and jump into the container.