Mongodb-express not working?

Question

Node.js

Install mongo-express: npm install mongo-express -g
From /usr/lib/node_modules/mongo-express
folder Try to run nodejs app.js
Run:

[email protected]:/usr/lib/node_modules/mongo-express# nodejs app.js
Mongo Express server listening on port 8082 at 127.0.0.1
Database connected!
Admin Database connected

But the site is not reachable on this port

Answer 1

Port 8081 is busy.