Ubuntu - Node.js - Install node.js

Update your system

sudo apt-get update
sudo apt-get install git-core curl build-essential openssl libssl-dev python

git clone https://github.com/nodejs/node.git
cd node

NOTE: If you require a specific version of Node:

git tag # Gives you a list of released versions
git checkout v13.10.1

./configure
make
sudo make install

NOTE: This might take a while, depending on your hardware.

node -v

curl -L https://npmjs.org/install.sh | sudo sh

WARNING: Running a script directly from the web can be dangerous, as it may contains trojans.

Instead, you may want to download the script, and then review the contents before actually installing it.

npm -v