Answers for "how to install node exporter in ubuntu 20.04"

ubuntu 20.04 how to install npm

sudo apt update
sudo apt install nodejs npm

install nodejs 14 for ubuntu 20.04

sudo apt update
curl -sL https://deb.nodesource.com/setup_14.x | sudo bash -

cat /etc/apt/sources.list.d/nodesource.list
deb https://deb.nodesource.com/node_14.x focal main
deb-src https://deb.nodesource.com/node_14.x focal main

sudo apt -y install nodejs

node -v
v14.18.2