Comment 18 for bug 1782709

And logging in on the console the apt process was waiting on for some answers:
ps aux | grep apt
root 13335 0.1 6.6 116500 67388 pts/1 S+ 19:30 0:00 apt upgrade
root 15048 0.0 0.3 11856 3628 pts/3 S+ 19:31 0:00 /bin/bash /usr/bin/ucf --three-way --debconf-ok /usr/share/unattended-upgrades/20auto-upgrades-disabled /etc/apt/apt.conf.d/20auto-upgrades
root 15090 0.0 0.4 24460 4976 pts/3 S+ 19:31 0:00 whiptail --backtitle Package configuration --title Configuring unattended-upgrades --output-fd 11 --nocancel --default-item keep the local version currently installed --menu A new version (/usr/share/unattended-upgrades/20auto-upgrades-disabled) of configuration file /etc/apt/apt.conf.d/20auto-upgrades is available, but the version installed currently has been locally modified. What do you want to do about modified configuration file 20auto-upgrades? 17 211 7 -- install the package maintainer's version keep the local version currently installed show the differences between the versions show a side-by-side difference between the versions show a 3-way difference between available versions do a 3-way merge between available versions start a new shell to examine the situation
root 16771 0.0 0.1 13136 1148 tty1 S+ 19:41 0:00 grep --color=auto apt