preseed.sh

#!/usr/bin/env bash

# thanks to https://lists.debian.org/debian-user/2012/03/msg01962.html

exec >>/home/vagrant/bootstrap.out 2>&1
set -x

echo "UseDNS no" >> /etc/ssh/sshd_config
echo "127.0.0.1 ubuntu-16.04-server-amd64" >> /etc/hosts
mkdir -p /home/vagrant/.ssh
wget https://raw.githubusercontent.com/mitchellh/vagrant/master/keys/vagrant.pub -O /home/vagrant/.ssh/authorized_keys
chmod 755 /home/vagrant/.ssh
chmod 644 /home/vagrant/.ssh/authorized_keys
chown -R vagrant:vagrant /home/vagrant/.ssh
echo 'Defaults:vagrant !requiretty' > /etc/sudoers.d/vagrant
echo '%vagrant ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers.d/vagrant
chmod 440 /etc/sudoers.d/vagrant
sed -i 's/PermitRootLogin yes/PermitRootLogin no/g' /etc/ssh/sshd_config
sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/g' /etc/ssh/sshd_config
rm /etc/udev/rules.d/70-persistent-net.rules
sed -i 's/GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"/g' /etc/default/grub
update-grub
aptitude clean
dd if=/dev/zero of=/EMPTY bs=1M
rm -f /EMPTY

exit 0