title: Adding files to sourcecontrol on linux using cleartool
body: <p>I have a file that i want to add to sourcecontrol on linux using <code>cleartool</code> .
  I've followed the IBM documentation for this, i've tried this:</p>
  
  <pre><code>cleartool mkelem testScript.sh
  </code></pre>
  
  <p>I got an error:  Can't modify directory "." because it is not checked out.
  I also would like to know how can i checkout/checkin files or directories and setting activities.</p>