"sudo systemctl enable nodered.service" in ubuntu fail?

[gaofei207]

If close the window ,the service do not keep running in the background.

I find a similar topic in Unhandled rejection Error: EACCES: permission denied,.

sudo apt-get purge nodejs

bash <(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resources/update-nodejs-and-nodered)

also no effect.

Thanks.