この辺ですねー
$ ps xa
:
3363 ? Ss 0:00 /bin/sh /usr/lib/apt/apt.systemd.daily install
3378 ? S 0:00 /bin/sh /usr/lib/apt/apt.systemd.daily lock_is_held i
3420 ? Sl 0:55 /usr/bin/python3 /usr/bin/unattended-upgrade
13571 ? S 0:00 /usr/bin/python3 /usr/bin/unattended-upgrade
13600 ? S 0:00 /usr/bin/python3 /usr/bin/unattended-upgrade
13601 ? S 0:00 sh -c if [ -d /var/lib/update-notifier ]; then touch
13603 ? S 0:00 /bin/sh -e /usr/lib/update-notifier/update-motd-updat
13617 ? RN 0:00 /usr/bin/python3 /usr/lib/update-notifier/apt-check -