title: Unix-Changing Permissions-Files turned green
body: <p>I used this command on my folder in unix:</p>
  
  <pre><code>chmod -R go-rwx *
  </code></pre>
  
  <p>in order to change permissions for group and others.
  Doing this, many files turned <strong>green</strong> coloured, even simple data files.
  Why did this happened?What does it mean?
  Is it going to affect my files in a bad way?
  They seem to work right now, but I'm concerned about their general functionality.
  Thanks!    </p>