Forever on ubuntu

I am working on node.js where forever is installed. I am not sure where is intalled . when i go to project directory then type command forever list then it will display no forever

Can any body tell me how to check and how to resart processes.

My website is running. it means forever may be running

If forever list is empty, your nodeJS app is not running.

You have to start it first by doing forever start yourApp.js

You have to install forever with sudo.