Node.js Installing Using NVM on Ubuntu 18.04LTS

nodejs_nvm.sh

##Install Node.js and NPM from Ubuntu official repository

sudo apt update
curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
sudo apt-get install -y nodejs
nodejs --version

sudo apt install npm
npm --version


To download the nvm installation script from the project’s GitHub page, 
https://github.com/nvm-sh/nvm#installation-and-update

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.1/install.sh | bash

nano install_nvm.sh

bash install_nvm.sh

source ~/.profile

nvm ls-remote

nvm install 8.11.1 (install Latest LTS)

nvm use 8.11.1

node -v

nvm ls

nvm alias default 8.11.1

nvm use default

nvm current