Comment 5 for bug 1590321

This works in xenial:

bdmurray@clean-xenial-amd64:~$ sudo apt-get install unattended-upgrades
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  bsd-mailx mail-transport-agent
The following packages will be upgraded:
  unattended-upgrades
1 upgraded, 0 newly installed, 0 to remove and 141 not upgraded.
Need to get 31.7 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://192.168.10.7/ubuntu xenial-proposed/main amd64 unattended-upgrades all 0.90ubuntu0.2 [31.7 kB]
Fetched 31.7 kB in 0s (1,225 kB/s)
Preconfiguring packages ...
(Reading database ... 212849 files and directories currently installed.)
Preparing to unpack .../unattended-upgrades_0.90ubuntu0.2_all.deb ...
Unpacking unattended-upgrades (0.90ubuntu0.2) over (0.90) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for systemd (229-4ubuntu10) ...
Processing triggers for ureadahead (0.100.0-19) ...
Setting up unattended-upgrades (0.90ubuntu0.2) ...
Replacing config file /etc/apt/apt.conf.d/50unattended-upgrades with new version
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
bdmurray@clean-xenial-amd64:~$ sudo rm /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
rm: cannot remove '/var/log/unattended-upgrades/unattended-upgrades-dpkg.log': No such file or directory
bdmurray@clean-xenial-amd64:~$ sudo /usr/bin/unattended-upgrades