You may the following steps to install Node.js on Ubuntu 20.04.

Firstly, we will update the package manager using the command:

sudo apt update

Next, we will install the curl package, which we will use to download the Node.js installation package:

sudo apt install curl

Now download the Node.js installation package from the NodeSource repository:

curl -sL | sudo -E bash -

Install Node.js using the apt package manager:

sudo apt install nodejs

Check the version number to ensure that Node.js has been installed correctly:

node -v

That's it! You have successfully installed Node.js on Ubuntu 20.04 using the apt package manager.