bionic (8) powernapd.8.gz

NAME

       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 ABSENT_SECONDS.

DESCRIPTION

       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 /etc/powernap/config.

       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:

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

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

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

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

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

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

       [UDPMonitor]
              Tracks UDP activity by binding any specific port.

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

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

       http://launchpad.net/powernap

FILES

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

SEE ALSO

       pgrep(1), powernap(8))

AUTHOR

       This manpage and the utility was written by Dustin Kirkland <kirkland@canonical.com> 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 /usr/share/common-
       licenses/GPL.