Started unattended-upgrades.service - Unattended Upgrades Shutdown.
root@663318:~# grep -R "Unattended-Upgrade" /etc/apt/apt.conf.d/ | head -20
/etc/apt/apt.conf.d/20auto-upgrades:APT::Periodic::Unattended-Upgrade "1";
/etc/apt/apt.conf.d/50unattended-upgrades:Unattended-Upgrade::Allowed-Origins {
/etc/apt/apt.conf.d/50unattended-upgrades:Unattended-Upgrade::Package-Blacklist {
/etc/apt/apt.conf.d/50unattended-upgrades:Unattended-Upgrade::DevRelease "auto";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::AutoFixInterruptedDpkg "true";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::MinimalSteps "true";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::InstallOnShutdown "false";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Mail "";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::MailReport "on-change";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Remove-Unused-Dependencies "false";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Automatic-Reboot "false";
/etc/apt/apt.conf.d/50unattended-upgrades:// when Unattended-Upgrade::Automatic-Reboot is set to true
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Automatic-Reboot-WithUsers "true";
/etc/apt/apt.conf.d/50unattended-upgrades://Unattended-Upgrade::Automatic-Reboot-Time "02:00";
/etc/apt/apt.conf.d/50unattended-upgrades:// Unattended-Upgrade::SyslogEnable "false";
/etc/apt/apt.conf.d/50unattended-upgrades:// Unattended-Upgrade::SyslogFacility "daemon";
/etc/apt/apt.conf.d/50unattended-upgrades:// Unattended-Upgrade::OnlyOnACPower "true";
/etc/apt/apt.conf.d/50unattended-upgrades:// Unattended-Upgrade::Skip-Updates-On-Metered-Connections "true";
root@663318:~# cat /etc/apt/apt.conf.d/20auto-upgrades
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Unattended-Upgrade "1";