title: Question on chgrp
body: <p>I have a small requirement here. I have a directory with a lot of files. There are certain number of files which belong to X group and certain number of files which belong Y group. Now, my requirement is to convert the files belonging to X group to Y group. </p>
  
  <p>How quickly this can be done ? I assuming I might have to use xargs command. Please help.</p>