title: libprotobuf.so.8 cannot open shared object file
body: <p>I installed <code>caffe</code> on Ubuntu 16.04. </p>
  
  <p>In the terminal I type into Python and <code>import caffe</code>, no error tips. </p>
  
  <p>When I run a Python script use 'python demo.PY' I get one error with the following tip:</p>
  
  <pre><code>from ._caffe import Net SGDSolver... 
  </code></pre>
  
  <blockquote>
    <p>import error libprotobuf.so.8 cannot open shared object file.</p>
  </blockquote>
  
  <p>I checked my ubuntu os and just found libprotobuf.so.9. </p>
  
  <p>How do I fix this bug?</p>