[onerng talk] Some situation causes broken device node

[Paul Campbell]

On Wed, 17 Jun 2015 16:39:35 Robin Sheat wrote:
> -rw------- 1 root root 5 jun 16 16:25 /dev/ttyACM1
> $ sudo cat /dev/ttyACM1

that's deliberate we set those ownershipd and protections when we start up 
rngd - you might have rngd running and need to shut it down (kill will do) 
before you start playing with cat or other things to talk with the device 
directly

	Paul