install node version 12 code example

Example 1: update nodejs mac

sudo npm cache clean -f 
sudo npm install -g n
sudo n stable/lts

Example 2: install node 12 linux

sudo apt -y install curl dirmngr apt-transport-https lsb-release ca-certificates
curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -
sudo apt -y install nodejs

Example 3: node js download ubuntu

sudo apt install nodejs