When I type mongo it gives me error: MongoDB shell version: 2.4.14 connecting to: test Fri Dec 9 11:20:22.550 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:145 exception: connect fail...

I had an app running on port 3000 but deleted it. Now I try to kill that port with kill -9 but it doesn't help. I am trying now to run another app on that port but it gives EADDRINUSE : : : 3000.