service

Ubuntu 14.04 uses service instead systemd

Autostart

See /etc/rc2.d/README

cd /etc/rc2.d
ln -s ../init.d/prometheus-node-exporter ./S20-prometheus-node-exproter

Disable autostart

cd /etc/rc2.d
mv ./S20-prometheus-node-exproter ./K20-prometheus-node-exproter