the server springrts.com already installs automatic updates. sometimes its required to reboot the machine, i.e. when a new kernel version is installed. I've configured it to do so at 10 am GMT+1 as sometimes some kernel updates weren't installed for months.
Today it happened the first time and as you can see this post, it seems to have worked :)
So, if it silently disappears at ~10 am... thats the automatic reboot.
Better some services failing on reboot as beeing hacked! 8)
More technical:
/etc/apt/apt.conf.d/50unattended-upgrades:
Unattended-Upgrade::Automatic-Reboot "true";Unattended-Upgrade::Automatic-Reboot-Time "10:00";[/code]