How to install and update Nodejs on Ubuntu 20.04 LTS

1. Using Command
2. Install Specific Nodejs version.
3. Download tar.xz the file then install it.
4. Update Nodejs:
5. Uninstall NodeJs.
6. Uninstall the previous version then install the specific version:

1st way:

Step 1: Open your terminal or press Ctrl + Alt + T

Step 2: To install node.js use the following command:

sudo apt-get install nodejs
node -v  //Check Nodejs Version:
or 
node –version

Step 4: In most cases, you’ll also want to also install npm,(Node.js package manager.). Install by the following command:

sudo apt install npm

2nd Way

Install Specific Nodejs version.

Install Specific Node.js version using the NodeSouce repository: the latest version of Node.js can be installed from the NodeSource repository. Follow the steps below to install the Node.js on your Ubuntu.

GitHub - nodesource/distributions: NodeSource Node.js Binary Distributions

Step 1: Open your terminal or press Ctrl + Alt + T.

Step 2: Install curl:

sudo apt-get install curl

Step 3: Add Node.js PPA to the system.

curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -
sudo apt-get install -y nodejs

Note: Here, we are installing node.js version 16, if you want to install version 14, you can replace setup_16.x with setup_14.x. or the following link.

Step 4: Install Node.js:

sudo apt-get install -y nodejs

Step 5: Check version:

node -v 
or 
node –version
npm -v 
or 
npm –version

Congratulation, you have successfully installed Node.js and NPM on your Ubuntu machine.

3rd way

Step 01: Download Node.js

Node.js

sudo apt update  //update system repositories
sudo apt install xz-utils   // install the package xz-utils.
sudo tar -xvf node-v16.17.0-linux-x64.tar.xz  //extract .tar.xz file.
sudo cp -r node-v16.17.0-linux-x64/{bin,include,lib,share} /usr/
export PATH=/usr/node-v16.17.0-linux-x64/bin:$PATH  //update Path
node --version

Update Nodejs.

1. Update npm

npm install npm@latest -g
npm cache clean -f  //clean npm cache
npm install -g n    //install n Node’s version manager:
n latest  //update node to the latest version
sudo n [version.number]  //Install a specific version:
or
sudo n 16.04

Uninstall NodeJs:

sudo npm uninstall -g n
or
sudo apt-get remove nodejs
or
sudo apt purge nodejs

Uninstall the previous version then install the specific version:

sudo apt-get purge --auto-remove nodejs
curl -fsSL https://deb.nodesource.com/setup_14.x | sudo -E bash -
sudo apt-get install -y nodejs

How to upgrade node version ubuntu