The FTB Forum is now read-only, and is here as an archive.
To participate in our community discussions, please join our Discord! https://ftb.team/discord
A better way for most newbie Ubuntu/Linux users would be to install rcconf (installed by default on 12.04 and above) and then you can toggle startup scripts off and on via a gui like screen.
sudo apt-get install rcconf
You may have to install dialogue depending on your system configuration...