Thanks for posting the command that starts adsbox for you. My posting was wrong - because I read the command line options from the google-translated russian site. In translating the russian into english, google decided to "improve" the capitalisation. Checking the syntax in the original russian, I can see that the options are all lower case, so I will edit my post @ #157 to reflect this. Although I have managed to compile adsbox, I cannot really test it as I haven't a "beast". No idea why you beed a baud rate setting, as USB doesn't work like a serial port.
Can you tell us the exact error messages you get when trying to start the linux feeder software on your Pi? Best if you copy & paste the command to start it, and the error messages from a terminal, into a document, then copy & paste from that, to here. Sometimes it is as simple a thing as an extra " " character, or as we have discovered, a capital letter where it should be lower case.
That looks nice (openstreetmap map). Did you write the patch? Is this improved version available somewhere, because I would like to use it. I am sure the original developer of dump1090 (Salvatore Sanfilippo) would appreciate a copy.