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

ami-clean.sh

#!/bin/bash

# This script cleans up your EC2 instance before baking a new AMI.
# this works on Ubuntu (18+)
# Run the following command in a root shell:
#
# bash <(curl -s https://gist.githubusercontent.com/AstroTom/fb0f54d125d38574eae76f57c188c4f0/raw/ami-clean.sh)

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

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

# clean journal
journalctl --rotate
journalctl --vacuum-time=1s


# clean up cloud-init cache
test -d /var/lib/cloud && /bin/rm -rf /var/lib/cloud/*

#print_green 'Remove SSH keys'
#[ -f /home/ubuntu/.ssh/authorized_keys ] && rm /home/ubuntu/.ssh/authorized_keys
 
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 'AMI cleanup complete!'