how to install nodejs 12 version in ubuntu/ linux

 how to install node 12/14/16 version in ubuntu

Step 1) Update apt repository and setup node 16.x 

$ sudo apt update

$ sudo apt -y install curl dirmngr apt-transport-https lsb-release ca-certificates

$ curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -

Step 2) install nodejs

sudo apt -y install nodejs

sudo apt -y  install gcc g++ make

node --version

npm --version

   Check Node Working Or Not 

Step 1) Create Directory

$ mkdir ~/node_projects

$ cd ~/node_projects

Step 2) Create a new file called hello-node.js with the nano or vim command.

$ nano hello-node.js

• paste below contant in hello-node.js file

const http = require('http');

const hostname = '127.0.0.1';

const port = 4000;

const server = http.createServer((req, res) => {

  res.statusCode = 200;

  res.setHeader('Content-Type', 'text/plain');

  res.end('Hello, World!\n');

});

server.listen(port, hostname, () => {

  console.log(`Server running at http://${hostname}:${port}/`);

});

Step 3) Run below command

node hello-node.js

• Server running at http://127.0.0.1:4000

Step 4) Finally write http://127.0.0.1:4000 in your browser