systemctl-service-log-level

systemctl service-log-level SERVICE [LEVEL]

systemctl service-log-level gets or sets the runtime log level for a specific service via D-Bus. This allows adjusting service verbosity without restarting the service or editing configuration.The service must support the standard D-Bus logging interface for this to work.

emerg (0) - System unusablealert (1) - Immediate action requiredcrit (2) - Critical conditionserr (3) - Error conditionswarning (4) - Warning conditionsnotice (5) - Normal but significantinfo (6) - Informationaldebug (7) - Debug messages

Only works with services that expose the D-Bus logging interface. Changes are temporary and reset when the service restarts. Not all services support this feature.

The service-log-level subcommand provides per-service logging control, enabling debugging of specific services without affecting system-wide verbosity.

systemctl-log-level(1), systemctl-service-log-target(1), journalctl(1)