The value of the parameter (a astring) allows the debug level (logging level) to be specified in the smb.conf file. This parameter has been extended since the 2.2.x series, now it allow to specify the debug level for multiple debug classes. This is to give greater flexibility in the configuration of the system. The default will be the log level specified on the command line or level zero if none was specified. Example: log level = 3 passdb:5 auth:10 winbind:2