title: chmod 400 command is giving wrong permissions -r--r-----
body: <p>So I am trying to change the permissions for my ec2 .pem file with</p>
  
  <pre><code>chmod 400 key_ec2.pem
  </code></pre>
  
  <p>But afterward I keep getting</p>
  
  <pre><code>-r--r-----  1 Huanqing None   1692 Feb  3 11:26 key_ec2.pem
  </code></pre>
  
  <p>I am using Cygwin on Windows 8. Is there a setting I need to change? </p>