Step 1-: Open the terminal.

Step 2-: Run the following command.
sudo apt install nodejs

Step 3-: Once installed, verify it by checking the installed version using the following command
node –version
Step 4-: Install NPM package manager.
Run the following command to install npm package manager
sudo apt install npm

Step 5-: Once installed, verify it by checking the installed version using the following command
npm -version