title: How to get /etc/security/limits.conf changes reflected for processes running under headless user?
body: <p>To increase the FD limit for all processes on a Ubuntu Linux machine we did following changes in <code>/etc/security/limits.conf</code></p>
  
  <pre><code> soft nofile 10000
   hard nofile 10000
  </code></pre>
  
  <p>We also added session required <code>pam_limits.so</code> in <code>/etc/pam.d/login</code>.
  The changes got reflected for all the users who logged out and logged in again. Whatever new processes are starting under those users are getting new FD limits.</p>
  
  <p>But for the processes which are running under headless user the changes are not getting reflected. what is the way by which the changes can be reflected for the processes which are running under headless user as well ?</p>