how to get bitcoind to launch on startup/reboot? ubuntu 16.04
After putting the systemd file in /etc/systemd/system, make sure that your systemd file is set up to work with your installation (binary path, datadir path, etc. are correct). Then run sudo systemctl enable bitcoind.

Alternatively you can do edit your crontab with crontab -e and add the line 

@reboot bitcoind