Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//lib/systemd/system/unattended-upgrades.service

 [Unit]
Description=Unattended Upgrades Shutdown
After=network.target local-fs.target systemd-logind.service
RequiresMountsFor=/var/log /var/run /var/lib /boot
Documentation=man:unattended-upgrade(8)

[Service]
ExecStart=/usr/share/unattended-upgrades/unattended-upgrade-shutdown --wait-for-signal
KillMode=process
TimeoutStopSec=1800

[Install]
WantedBy=multi-user.target