I have VHF/UHF (SDR) receivers and my computer, and would like to get a feel for the local packet traffic activity and see if it exists and is something I'd be interested in, but frankly, I don't know where to begin.
My OS is Linux, do any packet programs work in a receive only mode so I can monitor activity without a call sign? I live in the NE US if that matters.
What frequencies should I listen on? Its been something like two decades since I last saw a packet station in operation and that was in an area where I suspect there was likely more packet activity than here (the SF Bay Area)