Starting with the most current 64bit ISO available:

Choose software to install:

  • SSH Server
  • Standard system utilities
  • Manual network config on ens160
apt update 
apt dist-upgrade -y
apt autoremove -y

[ shutdown and snapshot here if required ]
apt install -y chrony
sed -i 's|pool .* offline iburst|pool au.pool.ntp.org offline iburst|' \
    /etc/chrony/chrony.conf