This parameter is only available if Samba has been configured and compiled with the option --with-utmp. It specifies a directory pathname that is used to store the utmp or utmpx files (depending on the UNIX system) that record user connections to a Samba server. By default this is not set, meaning the system will use whatever utmp file the native system is set to use (usually /var/run/utmp on Linux). utmp Determined automatically /var/run/utmp