Host: OS X 10.11.5, VirtualBox 5.0.20
⇒ vagrant --version Vagrant 1.8.1 ⇒ vagrant init ubuntu/xenial64 <snip> ⇒ vagrant box list|grep xenial ubuntu/xenial64 (virtualbox, 20160531.0.0) ⇒ vagrant up <snip> ⇒ vagrant ssh -- sudo grep hosts /etc/nsswitch.conf sudo: unable to resolve host ubuntu-xenial hosts: files dns
Host: OS X 10.11.5, VirtualBox 5.0.20
⇒ vagrant --version
Vagrant 1.8.1
⇒ vagrant init ubuntu/xenial64
<snip>
⇒ vagrant box list|grep xenial
ubuntu/xenial64 (virtualbox, 20160531.0.0)
⇒ vagrant up
<snip>
⇒ vagrant ssh -- sudo grep hosts /etc/nsswitch.conf
sudo: unable to resolve host ubuntu-xenial
hosts: files dns