Failed at the [email protected] start script 'node app.js'

[MuhammadTamzid]

after run npm start raise this error

[email protected] start /home/tamzid/workspace/react/chat_demo
node app.js

events.js:141
throw er; // Unhandled 'error' event
^

Error: listen EADDRINUSE :::3000
at Object.exports._errnoException (util.js:870:11)
at exports._exceptionWithHostPort (util.js:893:20)
at Server._listen2 (net.js:1234:14)
at listen (net.js:1270:10)
at Server.listen (net.js:1366:5)
at Object. (/home/tamzid/workspace/react/chat_demo/app.js:29:8)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)

npm ERR! Linux 3.19.0-31-generic
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "start"
npm ERR! node v4.4.3
npm ERR! npm v2.15.1
npm ERR! code ELIFECYCLE
npm ERR! [email protected] start: node app.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script 'node app.js'.
npm ERR! This is most likely a problem with the reactjs-socket-io-chat-app package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node app.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs reactjs-socket-io-chat-app
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR! npm owner ls reactjs-socket-io-chat-app
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /home/tamzid/workspace/react/chat_demo/npm-debug.log

[ribeiroevandro]

This is looking like permission error, a module is not installed properly, tried to run using sudo or giving permission for your user?
I run here and had no problems, I believe that it can be...

[ppozniak]

Isn't Error: listen EADDRINUSE :::3000 thrown when port 3000 is already in use?

[Paramchoudhary]

install node module or copy paste N.M. in the folder.