Comment 11 for bug 1577215

Verified with 1.1ubuntu1.18.04.7~16.04.2 on Xenial.

root@x-uu-lp-1260041:~# dpkg -l unattended-upgrades | cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================-==========================-============-===========================================
ii unattended-upgrades 1.1ubuntu1.18.04.7~16.04.2 all automatic installation of security upgrades
root@x-uu-lp-1260041:~# dpkg-reconfigure unattended-upgrades
root@x-uu-lp-1260041:~# env DEBIAN_FRONTEND=readline dpkg-reconfigure unattended-upgrades
Configuring unattended-upgrades
-------------------------------

Applying updates on a frequent basis is an important part of keeping systems secure. By default, updates need to be applied manually using package management tools.
Alternatively, you can choose to have this system automatically download and install important updates.

Automatically download and install stable updates? [yes/no] yes

root@x-uu-lp-1260041:~#