a). curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash
b). wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm