title: how to set this s on file permission?
body: <p>I need to create a file with the following permission</p>
  
  <pre><code>srw-rw-rw- 1 own group 0 Feb  6 22:12 myfile
  </code></pre>
  
  <p>I know chmod 666 would create the 'rw's, but what command to use to create the first s?</p>