Stopping postgresql from starting on ubuntu startup

Ubuntu 16.04.1 LTS I have tried: sudo update-rc.d -f postgresql remove and sudo vim /etc/postgresql/9.5/main/start.conf then i change the word "auto" to "disabled" Then i reboot the computer, and when it starts, i login and do: sudo service --status-all | grep postgresql Which returns: [ + ] postgresql So it is still starting when the server starts. What is left for me to do? I don't want this service running when the computer starts, only when i manually start it with: sudo service postgresql start