title: Import Error : libopencv_core.so.3.0:cannot open shared file
body: <p>I am using Ubuntu 12.04. I installed the opencv 3.0-beta version initially. Due to some reasons I switched back to an older version, 2.4.9, after uninstalling the older version using commands:</p>
  
  <pre><code>$&gt; sudo make uninstall
  $&gt; sudo find / -name "*opencv*" -exec rm -i {} \;
  </code></pre>
  
  <p>and I removed opencv 3.0.</p>
  
  <p>But now when I use opencv 2.4.9 and <code>import cv2</code> in Python, it shows</p>
  
  <blockquote>
    <p>Import Error :libopencv_core.so.3.0:cannot open shared object file: No such file or directory</p>
  </blockquote>
  
  <p>Does it mean that uninstallation was incomplete. Or is there any way to solve this error and <code>import cv2</code> for opencv 2.4.9?</p>