how to upgrade nodejs command line code example
Example 1: update nodejs
//First, clear the npm cache:
npm cache clean -f
//Install n, Node’s version manager:
npm install -g n
//With the n module installed, you can use it to:
Install the latest stable version: n stable
Install the latest release: n latest
Example 2: how to update node in ubuntu 18.04
sudo npm cache clean -f
sudo npm install -g n
sudo n stable