h2. Install prerequisites
-The Arvados package repository includes Workbench server package that can help automate much of the deployment.
+The Arvados package repository includes a Workbench server package that can help automate much of the deployment.
h3(#install_ruby_and_bundler). Install Ruby and Bundler
<notextile>
<ol>
-<li><a href="https://www.phusionpassenger.com/documentation/Users%20guide%20Nginx.html">Install Nginx and Phusion Passenger</a>.</li>
+<li><a href="https://www.phusionpassenger.com/library/walkthroughs/deploy/ruby/ownserver/nginx/oss/install_passenger_main.html">Install Nginx and Phusion Passenger</a>.</li>
<li>If you're deploying on CentOS and using the python27 Software Collection, configure Nginx to use it: