title: Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/node-sass/build'
body: <p>I am trying to run an Angular application. I execute the <a href="https://angular.io/cli/serve" rel="noreferrer"><code>ng serve</code></a> command, but it then shows:</p>
  <blockquote>
  <p>Error: Cannot find module 'node-sass'</p>
  </blockquote>