Node.js is a JavaScript runtime environment that allows developers to write server-side applications using the same language as client-side web development. It uses an event-driven, non-blocking I/O model that makes it efficient and scalable, even for handling large amounts of data in real-time. Its rich library of modules and tools makes it a popular choice for building web APIs and microservices.


SSH login details


Step 1: Login to the server via ssh

$ ssh username@IP

Step 2: Install the Node.js stable version.

$ sudo apt install nodejs -y

The above command is used for ubuntu os, For centos you can use yum instead of apt.

Step 3: Verify the installed Node.js version.

$ sudo nodejs -v

Step 4: Create the sample .js file using the command as mentioned below,

$ sudo vim test.js

Step 5: Copy paste the below content in that test.js file

const http = require(‘http’);
const hostname = ‘’;
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader(‘Content-Type’, ‘text/plain’);
  res.end(‘Hello World!‘);

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);

Step 6: Start the node using the following command,

$ sudo node test.js

Now the node gets started.

Step 7:  If the port is blocked in the firewall run the below command to allow the port,

$ sudo iptables -I INPUT 1 -p tcp –dport 3000 -j ACCEPT

Step 8: Then try to start a node, using the node command below.

$ sudo node test.js

Open a browser and enter url The browser will display Hello World! message on the screen.


You have installed Node.js and successfully started the node on server.

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