All the details are available here.
--logfile /var/log/cxs.logIf you want to enable logging for all file uploads, including non-suspicious files (this really should only be done during testing), add the option --cleanlog to your command line.
tail -f /var/log/cxs.log(Replace /var/log/cxs.log with the full path and filename of your own logfile if you are using something different.)