title: Is "ruby script/plugin" a command?
body: <p>I was following an online tutorial to create an Ruby on Rails application on App Engine.</p>
  
  <p>There is one command which other people can run, but it didn't run on my Ubuntu 10.10:</p>
  
  <pre><code>ruby script/plugin install http://svn.avdi.org/nulldb/trunk/
  </code></pre>
  
  <p>When I try to run it, it complains: <code>ruby1.8: No such file or directory script/plugin (LoadError)</code></p>
  
  <p>What is wrong with my computer?</p>
  
  <pre><code>ruby  -v  ==&gt; 1.8.7
  rails -v  ==&gt; 2.3.10  
  gem   -v  ==&gt; 1.3.7
  </code></pre>