systemd.kill — Kill environment configuration
service.servicesocket.socketmount.mountswap.swap
Unit configuration files for services, sockets, mount points and swap devices share a subset of configuration options which define the process killing parameters of spawned processes.
This man page lists the configuration options shared by these four unit types. See systemd.unit(5) for the common options of all unit configuration files, and systemd.service(5), systemd.socket(5), systemd.swap(5) and systemd.mount(5) for more information on the specific unit configuration files. The execution specific configuration options are configured in the [Service], [Socket], [Mount], or [Swap] section, depending on the unit type.
KillMode=¶Specifies how
                                processes of this service shall be
                                killed. One of
                                control-group,
                                process,
                                none.
If set to
                                control-group all
                                remaining processes in the control
                                group of this unit will be terminated
                                on unit stop (for services: after the
                                stop command is executed, as
                                configured with
                                ExecStop=). If set
                                to process only the
                                main process itself is killed. If set
                                to none no process is
                                killed. In this case only the stop
                                command will be executed on unit
                                stop, but no process be killed
                                otherwise. Processes remaining alive
                                after stop are left in their control
                                group and the control group continues
                                to exist after stop unless it is
                                empty. Defaults to
                                control-group.
Processes will first be
                                terminated via SIGTERM (unless the
                                signal to send is changed via
                                KillSignal=). If
                                then after a delay (configured via the
                                TimeoutSec= option)
                                processes still remain, the
                                termination request is repeated with
                                the SIGKILL signal (unless this is
                                disabled via the
                                SendSIGKILL=
                                option). See
                                kill(2)
                                for more
                                information.
KillSignal=¶Specifies which signal to use when killing a service. Defaults to SIGTERM.
SendSIGKILL=¶Specifies whether to send SIGKILL to remaining processes after a timeout, if the normal shutdown procedure left processes of the service around. Takes a boolean value. Defaults to "yes".