I have followed the Lecture: Install Vagrant for M31, including Troubleshooting.
the directories fro shared and dataset are not visible on the Host VM, even though you can see hello on the host.
vagrant@m312:~ cat /shared/test.txt
vagrant@m312:~ ls -l
drwxrwxrwx 3 root root 4096 Nov 15 14:39 data