invalid node version node/v4.2.1/bin/yarn ubuntu 18.04 code example

Example 1: yarn ubuntu

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

Example 2: install yarn

brew install yarn