Due to the unique approach of Canonical to packaging vagrant boxes, the current ubuntu/xenial box has a hardcoded machine name which causes an error when you try to bring up a second VM using the same base box:
A VirtualBox machine with the name 'ubuntu-xenial-16.04-cloudimg' already exists.
Please use another name or delete the machine with the existing name, and try again.
There's a stackoverflow question about this and a good answer (not the accepted one, the highest-voted one) which helped me a bit but it still wasn't completely clear to me how to fix my problem and I had to dig about a bit. Continue reading