Provided by: powernap_2.21-0ubuntu1_all bug


       powernapd  -  configurable daemon that will run at a specified INTERVAL_SECONDS, executing
       powernap when all of a  list  of  MONITORS  are  missing  or  inactive  for  a  contiguous


       powernapd  will  run  powernap(8)  when  none  of a set of MONITORS have executed for some
       number of ABSENT_SECONDS.

       powernapd will check for activity on each enabled monitor  every  INTERVAL_SECONDS.   Note
       that MONITORS taking less than INTERVAL_SECONDS to execute may be overlooked by powernapd.
       Choose your INTERVAL_SECONDS  value  accordingly.   These  parameters  are  configured  in

       It  acts  as a sort of "screensaver" for servers, watching the process table for activity,
       rather than the keyboard or mouse.  For instance, PowerNap can automatically  "pm-suspend"
       a system if no instance of "kvm" runs for some contiguous block of "300" seconds, checking
       the process table every "1" second.

       The available MONITORS are:

              Tracks activity in any console (tty), as well as  activity  of  any  PS2  connected
              mouse or keyboard. Monitor enabled by default.

              Tracks activity by searching for a process regex in the Process Table.

              Tracks Input activity from /dev/input. It usually tracks keyboard and mice activity
              connected through USB.

              Tracks system load activity given a load threshold.  Monitor  enabled  by  default,
              with a threshold matching the number of processors in the system.

              Tracks  WoL data packets received in any of the network interfaces (eth's). Monitor
              enabled by default to listen in ports 7 and 9.

              Tracks TCP activity by checking any ESTABLISHED connection in  any  port,  such  as
              ssh, httpd, etc.

              Tracks UDP activity by binding any specific port.

              Tracks Process I/O activity for a given process name, or regex.

       For more information about the MONITORS, refer to /etc/powernap/config.


       /etc/powernap/action,  /etc/powernap/config, /var/run/, /var/log/powernap.log,


       pgrep(1), powernap(8))


       This manpage and the utility was written by Dustin Kirkland  <>  for
       Ubuntu  systems  (but  may  be used by others).  Permission is granted to copy, distribute
       and/or modify this document under the terms of the GNU General Public License,  Version  3
       published by the Free Software Foundation.

       On  Debian  systems,  the  complete text of the GNU General Public License can be found in