title: RoR Rake 10.4.2 Error: "Don't know how to build task 'db:'"
body: <p>I want to create a MySQL database in Ruby on Rails using:</p>
  
  <pre><code>rake db: create
  </code></pre>
  
  <p>But it gives me out an error:</p>
  
  <blockquote>
    <p>rake aborted! Don't know how to build task 'db:'</p>
  </blockquote>
  
  <p>I am running Ubuntu and cant find answers on the internet about my version of rake (10.4.2).</p>