How to kill an serial-terminal session that have hangup ?

How to kill an serial-terminal session that have hangup in background?

I have worked with serial-terminal connected to usb, via winbox and a new terminal window… when I have closed the new terminal window the I have leaved the the serial-terminal session open, I think so. The problem is that I dont know how to kill that session so I can run pppout client interface to that usb port.

Thanks.

I have same problem.
Reboot can’t help.

RB150 with ROS4.2



Reset configuration solved the problem.