How to update node to latest version

We use n module from npm to upgrade node to the stable version

sudo npm cache clean -f
sudo npm install -f n
sudo n stable

To upgrade to the latest version (no stable version)

sudo n latest

Fix PATH /usr/bin/node

sudo apt-get install --reinstall nodejs-legacy

To undo n installation

sudo n rm x.y.z # replace x.y.z with version of Node installed
sudo npm uninstall -f n

Found in David Walsh blog.