I wanted to do some custom styling on a Drupal page. Since I use Markdown, I couldn’t just add CSS to the page’s HTML. I needed to tell Drupal to make a CSS file available.

• Edit themename.info and add

  stylesheets[all][] = kpk-custom/kpk.css

• Put stylesheets in /blah/sites/drupal/kpk-custom

• cd to theme dir and

  ln -s /blah/sites/drupal/kpk-custom kpk-custom

Login to the site as admin, choose Configuration from the admin toolbar, then Performance, then Clear All Caches.