
"certbot.plugins.util"
**********************

Plugin utilities.

certbot.plugins.util.already_listening(port, renewer=False)

   Check if a process is already listening on the port.

   If so, also tell the user via a display notification.

   Warning: On some operating systems, this function can only
     usefully be run as root.

   Parameters:
      **port** (*int*) -- The TCP port in question.

   Returns:
      True or False.
