title: How tar xvfz works in cygwin?
body: <p>I tried tar with xvfz and -xvfc both didn't work in Cygwin on Windows.</p>
  
  <pre><code>$ tar xvfz sshpass-1.0.5.tar.gz
  tar (child): sshpass-1.0.5.tar.gz: Cannot open: No such file or directory
  tar (child): Error is not recoverable: exiting now
  tar: Child returned status 2
  tar: Error is not recoverable: exiting now
  </code></pre>
  
  <p>Here cmd tar with '-'</p>
  
  <pre><code>$ tar -xvfz sshpass-1.0.5.tar.gz
  tar: z: Cannot open: No such file or directory
  tar: Error is not recoverable: exiting now
  </code></pre>
  
  <p>Question : 
   1 . How does tar works with <code>-</code> or without <code>_</code> ?</p>
  
  <p>Please suggest to execute tar -xvfz sshpass-1.0.5.tar.gz.</p>