конфигурация таймера (Timer unit configuration)
Описание (Description)
A unit configuration file whose name ends in ".timer" encodes
information about a timer controlled and supervised by systemd,
for timer-based activation.
This man page lists the configuration options specific to this
unit type. See systemd.unit(5) for the common options of all unit
configuration files. The common configuration items are
configured in the generic [Unit] and [Install] sections. The
timer specific configuration options are configured in the
[Timer] section.
For each timer file, a matching unit file must exist, describing
the unit to activate when the timer elapses. By default, a
service by the same name as the timer (except for the suffix) is
activated. Example: a timer file foo.timer activates a matching
service foo.service. The unit to activate may be controlled by
Unit= (see below).
Note that in case the unit to activate is already active at the
time the timer elapses it is not restarted, but simply left
running. There is no concept of spawning new service instances in
this case. Due to this, services with RemainAfterExit= set (which
stay around continuously even after the service's main process
exited) are usually not suitable for activation via repetitive
timers, as they will only be activated once, and then stay around
forever.
