Clean instance before pubslihing custom AMI

public-ami-cleaner

# erase bash history
find /root/.*history /home/*/.*history -exec rm -f {} \;

# erase ssh authorized keys
find / -name "authorized_keys" –exec rm –f {} \;

sudo rm /etc/ssg/ssh_host_dsa_key* /etc/ssh/ssh_host_rsa_key* /etc/ssh/ssh_host_key* /etc/ssh/ssh_host_ecdsa_key*

# disable root and ubuntu user password
sudo passwd -l root
passwd -l ubuntu

# - make sure to remove any other passwords
# - configure sshd to allow only public key authentication
#   in sshd_config:
#     PubkeyAuthentication yes
#     PasswordAuthentication no

# use rkhunter to check for Linux rootkit vulnerabilities