rdlogmanager(1) is a Rivendell module for generating logs and reports. When invoked with no arguments, it will start up in GUI mode, described in Chapter 8, Generating Logs and Reports with RDLogManager. However, it can also be used in "batch" mode to generate and merge logs and reports by means of its command-line interface.
Full documentation of rdlogmanager's command line interface is available
by doing man 1 rdlogmanager
.