title: Can deb packages from one machine be installed in another?
body: <ol>
  <li>Install python-netinterfaces on machine1 using apt-get</li>
  <li>Copy the python-interfaces deb package cached in /var/cache/apt/archive from machine to machine2</li>
  <li>Change the /etc/apt/sources.list to point to the directory where the package is copied in machine2</li>
  <li>Run teh following command
  sudo apt-get install python-interfaces</li>
  </ol>
  
  <p>It inturn tries to install <strong>python-chardet-whl</strong> 
  and I get the error
  <strong>warning: the following packages cannot be authenticated!</strong></p>
  
  <p>If I install the python-chardlet-whl from command line it fails with the authentication error message. however, it passes with --force-yes message. </p>
  
  <p>I searched in the web for solutions and tried some suggestions like apt-key update, but nothing worked. 
  Is it possible to install package installed from one machine in another? </p>
  
  <p>note: Both have same hardware and OS/other-software is installed is same</p>