When your partner has internet access and a GUI available, you can use it to do maintenance work from anywhere in the world and via most of the devices available today. (SMartphones, tables, etc.)
With version 8 they did introduce the unattended access for linux systems too.
Unfortunally the installation routine does not always register the services correctly, so you can't access the remote system.
Fortunally there is a simple fix which works under ubuntu (and most debian based systems)
Just create a service entry yourself and set it to autostart, just as mentioned below:
cd /opt/teamviewer8/tv_bin/script sudo cp teamviewerd.sysv /etc/init.d/ sudo chmod 755 /etc/init.d/teamviewerd.sysv sudo update-rc.d teamviewerd.sysv defaults
With this in place you can now access the teamviewer instance on the linux system too.