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Open Unattended-upgrades Config for Editing
sudo nano /etc/apt/apt.conf.d/50unattended-upgrades
Uncomment These Lines and set to “true”
Unattended-Upgrade::Remove-Unused-Kernel-Packages "true"; Unattended-Upgrade::Remove-Unused-Dependencies "true"; Unattended-Upgrade::Automatic-Reboot "true";
Uncomment this to Enable All Updates (Security Updates are Default)
"${distro_id}:${distro_codename}-updates";
Open Config for Auto-upgrade Config for Editing
sudo nano /etc/apt/apt.conf.d/20auto-upgrades
Add These Lines
APT::Periodic::Download-Upgradeable-Packages "1"; APT::Periodic::AutocleanInterval "7";
Check Configuration Changes
sudo unattended-upgrades --dry-run --debug