Ubuntu sudo dpkg-reconfigure --priority=low unattended-upgrades
Raspian
- Update the package list, update all packages and remove any packages that are no longer required.
- Type sudo apt-get update -y && sudo apt-get dist-upgrade -y && sudo apt-get autoremove -y
- Type sudo apt-get install unattended-upgrades apt-listchanges bsd-mailx -y
This is the article I'm referencing: Setting up Automatic Updates on Raspberry Pi