Node, npm nvm advices

node_npm_nvm.advice

nvm github:
https://github.com/nvm-sh/nvm

install nvm (node version manager)
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash

list available node versions:
nvm ls-remote

then select one, and install:
nvm install 16.15.0

also you can set a default version using
nvm alias default 6.11.4

check versions:
node -v
npm -v

Source: https://stackoverflow.com/questions/46699582/how-to-clean-uninstall-nodejs-node-on-ubuntu-16-04

(this is an edit to make it easier searchable)