ubuntu server 16.04: cannot get supervisor to start automatically

I installed supervisor on ubuntu server 16.04. $ sudo apt-get install supervisor $ sudo update-rc.d supervisor defaults After rebooting, supervisor didn't get started automatically. Checked the status: qinking126@nas:~$ sudo service supervisor status [sudo] password for qinking126: ● supervisor.service - Supervisor process control system for UNIX Loaded: loaded (/lib/systemd/system/supervisor.service; disabled; vendor preset: enabled) Active: inactive (dead) Docs: http://supervisord.org I'm not sure why it's inactive (dead). What do I need to check to get it fixed?