This parameter configures logging backends. Multiple backends can be specified at the same time, with different log levels for each backend. The parameter is a list of backends, where each backend is specified as backend[:option][@loglevel]. The 'option' parameter can be used to pass backend-specific options. The log level for a backend is optional, if it is not set for a backend, all messages are sent to this backend. The parameter determines overall log levels, while the log levels specified here define what is sent to the individual backends. When is set, it overrides the and parameters. Some backends are only available when Samba has been compiled with the additional libraries. The overall list of logging backends: syslog file systemd lttng gpfs ringbuf The ringbuf backend supports an optional size argument to change the buffer size used, the default is 1 MB: ringbuf:size=NBYTES syslog@1 file