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Re: USB "null modem" cables and related Linux driver questions




On Thu, May 31, 2018 at 09:21:27AM -0500, Richard Owlett wrote:
> I have two computers with USB ports.
> I wish them to communicate as simply as mid-20th-century computers did.
> Then we used RS232-C with a null modem &/or  appropriate software software
> at both ends.
> 
> The underlying problem is that both ends egotistically expect to be
> *MASTER*.
> 
> The hardware problem is solvable [e.g.
> http://www.ftdichip.com/Products/Cables/USBtoUSB.htm].
> 
> The software is another case :<
> The best Linux specific link I've found is dated September 2005
> [http://www.linux-usb.org/usbnet/]
> 
> I've done DuckDuckGo searches for permutations/combinations of
>   usb, "peer to peer", lan, and bridge.
> Most is Windows/Mac centric.
> There were hints that needed drivers may exist in current Linux core.
> 
> Pointers to good references and/or better search terms?

Do you want:

- One end is a terminal, the other end offers login?   "agetty
  serial" and "minicom"

- TCP/IP over RS-232 serial?   Keyword is "PPP".

- TCP/IP over ethernet attached via USB? "usbnet" and treat them
  like ethernet adapters.

- Connect an actual hardware terminal like a VT320 to your Linux
  box? "agetty serial" again.

- Something else? Describe it.

-dsr-