Ubuntu 16.04 LTS cannot shut down

[Mariano Jara Melagrani]

On 01/07/2016 06:36 a.m., ubuntu-users-request at lists.ubuntu.com wrote:
> On 1 July 2016 at 09:56, M. Fioretti <mfioretti at nexaima.net> wrote:
>> > Hi Colin,
<snip>
>> > Jul  1 10:25:44 avalon systemd[1]: Starting Unattended Upgrades Shutdown...
<snip>
> Colin

Maybe the unattended upgrades is holding the shutdown process back?

Mariano