host: OS X 10.11.5
$ vboxmanage --version 5.0.20r106931
$ 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
$ vagrant ssh -- sudo grep ubuntu /etc/hosts sudo: unable to resolve host ubuntu-xenial
$ vagrant ssh -- sudo grep 127 /etc/hosts sudo: unable to resolve host ubuntu-xenial 127.0.0.1 localhost
$ cat /etc/hosts 127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts
host: OS X 10.11.5
$ vboxmanage --version
5.0.20r106931
$ 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
$ vagrant ssh -- sudo grep ubuntu /etc/hosts
sudo: unable to resolve host ubuntu-xenial
$ vagrant ssh -- sudo grep 127 /etc/hosts
sudo: unable to resolve host ubuntu-xenial
127.0.0.1 localhost
$ cat /etc/hosts
127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts