• Timer units will automatically have dependencies of typeRequires=andAfter=on sysinit.target, a dependency of typeBefore=on timers.target, as well asConflicts=andBefore=on shutdown.target to ensure that they are stopped cleanly prior to system shutdown. Only timer units involved with early bo...
When run as a system instance,systemdinterprets the configuration file system.conf and the files in system.conf.d directories; when run as a user instance, it interprets the configuration file user.conf (either in the home directory of the user, or if not found, under/etc/systemd/) and ...
repetitive, real-time dates and times. systemd timers can be configured to trigger based on status changes in other systemd units. For example, a timer might be configured to trigger a specific elapsed time after system boot, after startup, or after a defined service unit activates...
In this exercise, you build on the previous exercise to create and enable a timer unit to regularly run another systemd unit at a particular time or interval. Timer units can be defined at both the system level and the user level and can be used to define when systemd should run another ...
Timer .timer Systemd timer. Table 11-1 Note that the target unit type differs from other types in that it comprises a group of systemd units such as services or other targets. Dynamically Changing the Current Target The systemctl set-default command outlined previously specifies the target th...
All other users are mapped to nobody. * Support for the cgroup namespace has been added to systemd-nspawn. If supported by kernel, the container system started by systemd-nspawn will have its own view of the cgroup hierarchy. This new behaviour can be disabled using $SYSTEMD_NSPAWN_USE_...
Active could mean started, bound, plugged in, etc depending on the unit type. The unit could also be in process of changing states, reporting a state of <literal>activating</literal> or <literal>deactivating</literal>. A special <literal>failed</literal> state is entered when the ser...
The[Timer]section of a unit file can contain some of the following directives: OnActiveSec=: This directive allows the associated unit to be activated relative to the.timerunit’s activation. OnBootSec=: This directive is used to specify the amount of time after the system is booted when ...
route-only domain on it. This will ensure that other links will not be considered for these queries (unless they too carry such a routing domain). In order to route all such DNS queries to a specific link only if no other link is preferred, set the DefaultRoute= option for the link ...
Accuracyis the quality of closeness to the true time; in other words, how close to the specified calendar time an event is triggered by a timer. The default accuracy for systemd timers is defined as a one-minute timespan that starts at the defined calendar time. For example, an event spe...