How to install Node.js on Ubuntu

Install node.js using default repository of Ubuntu

Ubuntu 16.04 contains a version of node.js in its default repository.

The version of this node.js is 4.2.6

sudo apt-get update

sudo apt-get install nodejs

To install node.js package manager npm

sudo apt-get install npm

To check node.js version. Type this command -

node -v

npm -v

Install node.js using PPA

Step 1: Adding PPA

$ curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -

Step 2: Install Node.js

$ sudo apt-get install nodejs

Now you have done. :)

Lets try an example of node.js

Create a file http_server.js

$ vim http_server.js

add the following content

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World');
}).listen(3001, "127.0.0.1");
console.log('Server running at http://127.0.0.1:3001/');

Now to run the code on browser

node http_server.js

In browser type in url http://127.0.0.1:3001/