Express module not found when installed with NPM

Question

When I try to run the app.js file created by express, I get the following error:

$ node app.js

node.js:134
        throw e; // process.nextTick         


        

Answer 1

It looks like the easiest way to do this is to run npm install from your app's folder. This tells npm to hook everything up.

It's the last instruction after express :

...
dont forget to install dependencies:
$ cd  && npm install