Discovering systemd... I made a graph of the systemd settings, but I don't know how to interpret it yet...

Commands are :

systemctl --order dot > sysgraph.dot

then (after transfering the file on my Ubuntu pc):

cat sysgraph.dot | dot -Tsvg > sysgraph.svg

Result can be found here: http://ubuntuone.com/7jnlRCzUhnMtOgYqjSc72m