To start the command line in interactive mode on Linux run:
steve@CRANE:~/HammerDB-4.1$ ./hammerdbcli HammerDB CLI v4.1 Copyright (C) 2003-2021 Steve Shaw Type "help" for a list of commands The xml is well-formed, applying configuration hammerdb>
On Windows double-click hammerdbcli.bat
This will display a console command Window. On Windows this console command window has been designed to run with white text on a black background and sets the colour scheme accordingly.