title: How do you manually install the eclipse-CDT plugin from an archive/zip on ubuntu?
body: <p>I have successfully installed Eclipse 3.5 and Java 1.5. I would like to install CDT without using Eclipse's "install new features" (nor can i use the Eclipse-CDT installer) option because this computer is offline.</p>
  
  <p>What I did:</p>
  
  <ol>
  <li>I downloaded the <a href="http://download.eclipse.org/tools/cdt/releases/galileo/" rel="noreferrer">archive of cdt from CDT's official download page</a>.</li>
  <li>I used file-roller to unzip everything into the eclipse folder (the plugins/features now have a ton of <em>cdt</em> files)</li>
  <li>I started Eclipse with -clean</li>
  <li>When I clicked the New Project. The GUI dialog box did not show C/C++... and there was no C/C++ perspective</li>
  </ol>
  
  <p>Eclipse appeared to have ignored my unzipping CDT.</p>
  
  <p>Have you ever installed CDT using the offline archive?</p>
  
  <p>What steps have I missed?</p>