#!/bin/bash -eux # Apt cleanup. apt autoremove apt update # Delete unneeded files. rm -f /home/vagrant/*.sh rm /home/vagrant/VBoxGuestAdditions.iso # Zero out the rest of the free space using dd, then delete the written file. dd if=/dev/zero of=/EMPTY bs=1M rm -f /EMPTY # Add `sync` so Packer doesn't quit too early, before the large file is deleted. sync