Node.js - Getting started on Ubuntu 14.04 (Trusty Tahr)In this article we are going to have look into the installation and basic usage of node.js application. Node is a set of libraries for JavaScript which allows it to be used outside of the browser. It is primarily focused on creating simple, easy to build network clients and servers.Insatallation.You will have to download the package from the official sitehere. After the download type the following commands in the terminal.tar -xzf node-v0.x.x.tar.gzcd node-v0.x.x.tar.gz./configuresudo make install

The above commands should do the installations now lets go for the dependencies required.apt-get -y install build-essentialNow after the installation is completed just check it by typing:

The above commands are just to verify that your nodejs is installed properly. For futher information about the iinstallation clickhere.First Program.Its time that we start with the basic famous program "Hello World!." Just copy this code into any text editor and save it as "your-name.js".console.log('Hello World!.');

Now save that file and type in the following command:

This should print the infamous output on the terminal.hello world on http server.Now after the above, we are going to work with it on a http server or your localhost. Copy and paste following code in to your editor:var http = require('http');var server = http.createServer(function(req, res) {res.writeHead(200);res.end('Hello Http');});server.listen(8080);

And save it as "http.js". Now goto the terminal and type in:node http.jsThis will look something like

The first thing you'll notice is that this program, unlike our first one, doesn't exit right away. That's because a node program will always run until it's certain that no further events are possible. In this case the open http server is the source of events that will keep things going. Testing the server is as simple as opening a new browser tab, and navigating to the following url: http://localhost:8080/. As expected, you should see a response that reads: 'Hello Http'.

You can also check that by opening a new terminal window and typing: