make sure that npm and bower are already installed on your system 1) install Node.js -> https://nodejs.org/en/ (LTS Version) 2) install Bower
npm install bower
sudo gem install scss_lint
run this code initial or after changes in bower.json (bower) or package.json (npm) or when gulp brings error run the install.sh script for automated install
./install-packages.sh
or run bower and npm install
npm install
bower install
run gulp
gulp
run gulp build
gulp build