Node.js is an open source, lightweight and efficient cross-platform  run time environment for server-side and networking applications. Its written by  JavaScript. We can easily build and fast scalable network applications.

Yum Install:

 Execute curl command, 
 #  curl -sL https://rpm.nodesource.com/setup | bash -
 


+ rpm -qa 'node|npm' | grep -v nodesource



## Run `yum install -y nodejs` (as root) to install Node.js and npm.

## You may also need development tools to build native addons:

##   `yum install -y gcc-c++ make`

 Install development tool to build node.js
 
# yum install -y gcc-c++ make

 Now Install node.js,
 
# yum install -y nodejs

Once installation completed find the location,
 
# whereis node
node: /usr/bin/node /usr/share/node /usr/share/man/man1/node.1.gz


create a sample file for execute node.js, file name is  test.js

My system IP address is 192.168.1.5  and will assign port number to execute node.js : 9001


var http = require('http');

http.createServer(function (req, res) {

  res.writeHead(200, {'Content-Type': 'text/plain'});

  res.end('Hello thelinuxfaq.com\n');

}).listen(9001, '192.168.1.5');

console.log('Server running at http://192.168.1.5:9001/');

Run node.js in backend process,
 
# node  /var/www/html/test.js &

Check node.js nunning port number,
 
# netstat -anp | grep node


tcp        0      0 192.168.1.5:9001        0.0.0.0:*                   LISTEN      7997/node
# ps aux | grep node


root      7997  0.0  0.6 658820 12732 pts/1    Sl   15:44   0:00 /usr/bin/node /var/www/html/get.js


Finally check your browser with below url,

http://192.168.1.5:9001/

Output:

Hello thelinuxfaq.com

See more details:

# man node

 

How to Install Manually:


Download the tar.gz file from the URL : http://nodejs.org/download/ using wget command
 
# cd /usr/local/

#  wget  http://nodejs.org/dist/v0.10.34/node-v0.10.34.tar.gz

Extract that the node.js file 
 
# tar -xf node-v0.10.34.tar.gz

Execute file:
 
/usr/local/node-v0.10.34/bin/node   /var/www/html/get.js

Error :

If you may get an error like below,
 
[root@local]# node  /var/www/html/test.js &


Server running at http://192.168.0.13:9001/



events.js:72

        throw er; // Unhandled 'error' event

              ^

Error: listen EADDRNOTAVAIL

    at errnoException (net.js:904:11)

    at Server._listen2 (net.js:1023:19)

    at listen (net.js:1064:10)

    at net.js:1146:9

    at dns.js:72:18

    at process._tickCallback (node.js:419:13)

    at Function.Module.runMain (module.js:499:11)

    at startup (node.js:119:16)

    at node.js:906:3

Solution:

The node cannot listen to your system IP so need to check IP address,


listen(9001, '192.168.1.5');

console.log('Server running at http://192.168.1.5:9001/');