==== Unattended upgrades ====
=== Email From ===
Add the following line in //50unattended-upgrades//
<code>
Unattended-Upgrade::Sender "Unattended-upgrades Example <noreply@example.com>";
</code>

=== Automatic reboot ===
Uncomment the following lines in //50unattended-upgrades// and change accordingly
<code>
Unattended-Upgrade::Automatic-Reboot "true";
Unattended-Upgrade::Automatic-Reboot-Time "02:00";
</code>