WSL

wsl.sh

sudo apt-get update

// NODE JS
curl -sL https://deb.nodesource.com/setup_11.x | sudo -E bash -
sudo apt-get install -y nodejs

// NPM
sudo apt-get install npm
// or
sudo curl https://www.npmjs.com/install.sh | sh

// NODE-SASS
sudo npm install -g node-sass
// or on error
sudo npm install -g --unsafe-perm node-sass

// YARN
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
sudo apt update
sudo apt remove cmdtest
sudo apt install yarn