systemctl-log-level

systemctl log-level [LEVEL]

systemctl log-level gets or sets the logging verbosity of the systemd service manager (PID 1). Without arguments, it displays the current level. With a level argument, it changes the verbosity at runtime.Higher verbosity levels (debug, info) produce more log output and can help diagnose issues. Lower levels (err, crit) reduce noise in production.

emerg - System is unusablealert - Immediate action requiredcrit - Critical conditionserr - Error conditionswarning - Warning conditionsnotice - Normal but significantinfo - Informational messagesdebug - Debug-level messages

Changes are temporary and reset on reboot. For permanent changes, modify the systemd configuration. Debug level can produce significant log volume and impact performance.

The log-level subcommand provides runtime control over systemd's verbosity, useful for temporary debugging without configuration changes or restarts.

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