systemctl-service-log-level

Show service log level

$ systemctl service-log-level [service]

$ systemctl service-log-level [service] [emerg|alert|crit|err|warning|notice|info|debug]

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 unusable
alert (1) - Immediate action required
crit (2) - Critical conditions
err (3) - Error conditions
warning (4) - Warning conditions
notice (5) - Normal but significant
info (6) - Informational
debug (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)