Re: usb snooper

[Reco <recoverym4n@enotuniq.net>]

On Wed, Nov 27, 2019 at 07:03:13AM -0500, Gene Heskett wrote:
> On Wednesday 27 November 2019 01:55:50 Reco wrote:
> 
> > 	Hi.
> >
> > On Tue, Nov 26, 2019 at 05:05:13PM -0500, Gene Heskett wrote:
> > > Greetings all;
> > >
> > > I have what I believe to be noise or crosstalk causing interference
> > > between a wireless keyboard mouse and the machine they are
> > > controlling, which is an rpi4.  The app itself doesn't expose any
> > > usb traffic to the user. The effect is as if the finger was lifted
> > > from the key for a hundred ms or so at random intervals.
> > >
> > > So what, on an armhf raspi, do we have for a usbsnoop?
> >
> > /usr/sbin/tcpdump -D
> >
> > </thread>
>
> Thanks Reco, I had to install it, but then reread the man page a couple 
> times, but I don't get it yet: (screen snip)

tcpdump(8) says:

   -i interface
   --interface=interface
	  Listen on interface ...
	  If the -D flag is supported, an interface number as printed by
	that flag can be used as the interface argument, if no interface on the
	system has that number as a name.

So, 

sudo /usr/sbin/tcpdump -i 8

Reco