how to get bitcoind to launch on startup/reboot? ubuntu 16.04 Is there an easy way to ensure that bitcoind restarts on system reboot? I tried placing the systemd service file in /etc/systemd/system but that didn't seem to work... thanks in advance
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