title: Using Keytool to extract MD5 signature from Android apk
body: <p>I have the RSA file but I didn't understand how to issue a command line like this:</p>
  
  <pre><code>keytool -printcert -file CERT.RSA
  </code></pre>
  
  <p>I mean, where do I write this line? I tried opening Keytool.exe but it opens and closes immediately.</p>
  
  <p>Sorry for being so dumb.</p>