How to use systemctl in Ubuntu 14.04

Question

I try to perform the following command in Ubuntu 14.04:

systemctl enable --now docker-cleanup-dangling-images.timer

I also tried it with sudo,

Answer 1

I ran across this while on a hunt for answers myself after attempting to follow a guide using pm2. The goal is to automatically start a node.js application on a server. Some guides call out using pm2 startup systemd, which is the path that leads to the question of using systemctl on Ubuntu 14.04. Instead, use pm2 startup ubuntu.

Source: https://www.digitalocean.com/community/tutorials/how-to-set-up-a-node-js-application-for-production-on-ubuntu-14-04