Upgrading to the latest stable version
This will update you to the latest available stable version:
Upgrading to the latest LTS version
Node also offers a long-term support (LTS) version. If you need that version (or any other), simply specify the version number you want:
sudo npm cache clean -f sudo npm install -g n sudo n 4.4.2
Checking your Node version
To see which version of Node is currently installed, simply run:
The version number displayed is the one that’s currently active on your machine.