'parade help s' implies you can specify the listen port.
$ parade help s
s [command options] [pres_dir]
Serves the parade presentation in the specified (or current) directory
Command Options:
-h, --host=arg - Host or ip to run on (default: localhost)
-p, --port=arg - Port on which to run (default: 9090)
--verbose - Show verbose messaging
parade -p 9999
yields: "Unknown option -p"
parade --port 9999
yields: "Unknown option --port"
parade -p=9999
yields: "error: no implicit conversion of nil into String"
parade --port=9999
yields: "error: no implicit conversion of nil into String"
Adding the command text "s" or "server" or "serve" immediately after 'parade' and before the port arguments, or after the port arguments, does not change the error messages.
'parade help s' implies you can specify the listen port.
Adding the command text "s" or "server" or "serve" immediately after 'parade' and before the port arguments, or after the port arguments, does not change the error messages.