Automatic security updates

If you have multiple machines, make sure to stagger the Unattended-Upgrade::Automatic-Reboot-Time so they don't all restart at exactly the same time!
Automatic security updates are helpful when you are not able to access your machine but want critical security updates to be applied automatically.
sudo apt-get update -y
sudo apt-get install -y unattended-upgrades update-notifier-common
sudo vim /etc/apt/apt.conf.d/20auto-upgrades
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Unattended-Upgrade "1";
APT::Periodic::AutocleanInterval "7";
Unattended-Upgrade::Remove-Unused-Dependencies "true";
Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
# This is the most important choice: auto-reboot.
# This should be fine since all services should auto-start on reboot.
Unattended-Upgrade::Automatic-Reboot "true";
Unattended-Upgrade::Automatic-Reboot-Time "02:00";
sudo systemctl enable unattended-upgrades
sudo systemctl restart unattended-upgrades
Update system packages again.
sudo apt-get update -y
sudo apt-get upgrade -y
sudo apt-get dist-upgrade -y
Restart the machine.
sudo shutdown -r now
Congratulations! You've successfully enabled unattended-upgrades on your staking machine 🥳