title: Set files permission after install
body: <p>I found this example how to build deb package.</p>
  
  <p><a href="http://blog.noizeramp.com/2005/08/31/packaging-java-applications-for-ubuntu-and-other-debians/" rel="nofollow">http://blog.noizeramp.com/2005/08/31/packaging-java-applications-for-ubuntu-and-other-debians/</a></p>
  
  <p>I'm interested how I can set files permission after files are installed?</p>
  
  <pre><code>Package: myapp
  Version: _version_
  Section: web
  Priority: optional
  Architecture: all
  Maintainer: Aleksey Gureev 
  Description: my first sample application which isn't
   doing anything special.
   .
   And other description goes
   here too.
   .
  </code></pre>