systemd-hibernate-resume-generator(8) [freebsd man page]
SYSTEMD-HIBERNATE-RESUME-GENERATOR(8) systemd-hibernate-resume-generator SYSTEMD-HIBERNATE-RESUME-GENERATOR(8)NAME
systemd-hibernate-resume-generator - Unit generator for resume= kernel parameter
systemd-hibernate-resume-generator is a generator that instantiates systemd-hibernate-resume@.service(8) unit according to the value of
resume= parameter specified on the kernel command line.
KERNEL COMMAND LINE
systemd-hibernate-resume-generator understands the following kernel command line parameters:
Takes a path to the resume device. Both persistent block device paths like /dev/disk/by-foo/bar and fstab(5)-style specifiers like
"FOO=bar" are supported.
SEE ALSO systemd(1), systemd-hibernate-resume@.service(8), kernel-command-line(7)systemd 237SYSTEMD-HIBERNATE-RESUME-GENERATOR(8)
Check Out this Related Man Page
SYSTEMD-SUSPEND.SERVICE(8) systemd-suspend.service SYSTEMD-SUSPEND.SERVICE(8)NAME
systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, systemd-suspend-then-hibernate.service, systemd-sleep -
System sleep state logic
systemd-suspend.service is a system service that is pulled in by suspend.target and is responsible for the actual system suspend.
Similarly, systemd-hibernate.service is pulled in by hibernate.target to execute the actual hibernation. Finally,
systemd-hybrid-sleep.service is pulled in by hybrid-sleep.target to execute hybrid hibernation with system suspend and pulled in by
suspend-then-hibernate.target to execute system suspend with a timeout that will activate hibernate later.
Immediately before entering system suspend and/or hibernation systemd-suspend.service (and the other mentioned units, respectively) will
run all executables in /lib/systemd/system-sleep/ and pass two arguments to them. The first argument will be "pre", the second either
"suspend", "hibernate", "hybrid-sleep", or "suspend-then-hibernate" depending on the chosen action. Immediately after leaving system
suspend and/or hibernation the same executables are run, but the first argument is now "post". All executables in this directory are
executed in parallel, and execution of the action is not continued until all executables have finished.
Note that scripts or binaries dropped in /lib/systemd/system-sleep/ are intended for local use only and should be considered hacks. If
applications want to react to system suspend/hibernation and resume, they should rather use the Inhibitor interface.
Note that systemd-suspend.service, systemd-hibernate.service, and systemd-hybrid-sleep.service systemd-suspend-then-hibernate.service
should never be executed directly. Instead, trigger system sleep states with a command such as "systemctl suspend" or similar.
Internally, this service will echo a string like "mem" into /sys/power/state, to trigger the actual system suspend. What exactly is written
where can be configured in the "[Sleep]" section of /etc/systemd/sleep.conf or a sleep.conf.d file. See systemd-sleep.conf(5).
systemd-sleep understands the following commands:
Print a short help text and exit.
Print a short version string and exit.
suspend, hibernate, hybrid-sleep, suspend-then-hibernate
Suspend, hibernate, suspend then hibernate, or put the system to hybrid sleep.
SEE ALSO systemd-sleep.conf(5), systemd(1), systemctl(1), systemd.special(7), systemd-halt.service(8)NOTES
1. Inhibitor interface
systemd 237 SYSTEMD-SUSPEND.SERVICE(8)