Script to clean up Ubuntu EC2 instance before packaging as an AMI

ami-clean.sh

#!/bin/bash

function print_green {
  echo -e "\e[32m${1}\e[0m"
}

print_green 'Clean Apt'
apt-get -y autoremove
aptitude clean
aptitude autoclean

print_green 'Remove user SSH keys'
# [ -f /home/ubuntu/.ssh/authorized_keys ] && rm /home/ubuntu/.ssh/authorized_keys
for homefolder in /home/*; do
  rm -rf $homefolder/.ssh
done
rm -rf /root/.ssh

print_green 'Remove host keys for regeneration at first boot'
for hostkey in /etc/ssh/*_host_*; do
  rm $hostkey
done

print_green 'Cleanup log files'
find /var/log -type f | while read f; do echo -ne '' > $f; done

print_green 'Cleanup bash history'
unset HISTFILE
[ -f /root/.bash_history ] && rm /root/.bash_history
[ -f /home/ubuntu/.bash_history ] && rm /home/ubuntu/.bash_history

print_green 'manually clean up ifcfg scripts?'
grep 'HOSTNAME=' /etc/sysconfig/network-scripts/ifcfg-*
grep 'HWADDR=' /etc/sysconfig/network-scripts/ifcfg-*

print_green 'AMI cleanup complete!'

need to add more things from https://github.com/libguestfs/libguestfs/tree/master/sysprep