From Hentschel
sudo apt-get install nut
* configure nut, link with instructions https://wiki.ipfire.org/addons/nut/detailed
** configure ''ups.conf''
<pre>
** configure the UPS daemon via ''upsd.conf''
<pre>
LISTEN 127.0.0.1 3493 LISTEN 192.168.1.108 3493
</pre>
** and add users to ''upsd.users''
<pre>
[admin]
password = xxxxx
actions = SET FSD
instcmds = ALL
upsmon master
[ups]
password = xxxxx
upsmon slave
</pre>