title: Not able to install s3cmd offline
body: <h1>We are trying to install s3cmd in off-line mode but we are getting below error.</h1>
  
  <pre><code>Searching for python-magic
  Reading https://pypi.python.org/simple/python-magic/
  Download error: [Errno 101] Network is unreachable -- Some packages may not be found!
  Couldn't find index page for 'python-magic' (maybe misspelled?)
  Scanning index of all packages (this may take a while)
  Reading https://pypi.python.org/simple/
  Download error: [Errno 101] Network is unreachable -- Some packages may not be found!
  No local packages or download links found for python-magic.
  error:Could not find suitable distribution for Requirement.parse('python-magic')
  ===
  </code></pre>
  
  <p>Btw, python-magic-4.24-43.27.1 is already installed in our server but why s3cmd is not detecting it?</p>
  
  <p>Is there any way skip those steps and install s3cmd?</p>