title: Openssl is not recognized as an internal or external command
body: <p>I wish to generate an application signature for my app which will later be integrated with Facebook. In one of Facebook's tutorials, I found this command:</p>
  
  <pre><code>keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64
  </code></pre>
  
  <p>In the tutorial, it says that by running this cmd, my process of generating the signature will start.</p>
  
  <p>However, this command gives an error:</p>
  
  <pre><code>openssl is not recognized as an internal or external command
  </code></pre>
  
  <p>How can I get rid of this?</p>