diff --git a/scripts/init-ubuntu.sh b/scripts/init-ubuntu.sh
index 887e44809..022a4a4d7 100755
--- a/scripts/init-ubuntu.sh
+++ b/scripts/init-ubuntu.sh
@@ -120,6 +120,7 @@ apt-get -o Dpkg::Options::="--force-confold" install -y --no-install-recommends
 # this ensures that unattended upgades are enabled, if it was disabled during ubuntu install time (see #346)
 # debconf-set-selection of unattended-upgrades/enable_auto_updates + dpkg-reconfigure does not work
 # logs of upgrades are at /var/log/apt/history.log and /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
+# apt-daily-upgrade.service (timer) runs the unattended-upgrades script depending on APT::Periodic::Unattended-Upgrade
 echo "==> Enabling automatic upgrades"
 cp /usr/share/unattended-upgrades/20auto-upgrades /etc/apt/apt.conf.d/20auto-upgrades