Ubuntu Xenial64 on Virtual Box and Vagrant

There was a lot of strange problems with ubuntu/xenial64, and in https://github.com/mitchellh/vagrant/issues/6616 there is a mention by Seth Vargo (employee of Hashicorp)

    

The ubuntu/xenial64 box is built wrong and horribly broken. Please note that "ubuntu" is the name of a user, not a representation of a canonical source for ubuntu images. Please try bento/ubuntu-16.04 instead. Thanks.
https://github.com/mitchellh/vagrant/issues/6616#issuecomment-227776489

These errors included following:

rejecting i/o to offline device

This happened almost everytime after heavier I/O operations, for example after loading Docker images.

stderr: Inappropriate ioctl for device

I think that this happened when Vagrant tried to setup network interfaces, mainly "enp0s8".

So just use bento/ubuntu-16.04