title: Cloud9 environment variables
body: <p>I am developing a Rails 4 app on cloud9 (c9.io). When I placed <code>SECRET="geheim"</code> in config file, it works fine. I tried setting an environment variable using</p>
  
  <pre><code>echo "export SECRET=geheim" &gt;&gt; ~/.profile
  </code></pre>
  
  <p>and then using <code>ENV['SECRET']</code> in config file, but it doesn't work. When I type <code>printenv SECRET</code> in console, it returns nothing, meaning the variable is not set. How can I fix this? Thanks.</p>