screen command leaves pid open on ssh server
 

I reverse tunnel from a notebook to a ssh server.

A script runs at startup and opens tunnel no problem. Except when the notebook is shutdown, the tunnels ssh pid stays open on the server. It results in a port forwarding error whenever the notebook restarts, because the port is still open and is reserved on the ssh server.

Example on the ssh server:

So this pid stays open even when the notebook shuts down or restarts. This is all invoked by the notebook script.

Notebook command:

This means I have to kill the pid manually on the ssh server before the notebook can ssh again after any restart.

Is my screen commands wrong..?

I think you want to put 'autodetach off' into .screenrc on server.

The screen is used on the notebook not the server ( I guess I don't understand screen well enough) :(

What I did is added "autodetach off" to ~/.screenrc of the notebook. And then restarted the notebook.

Then on the server to see if it had killed the pid that the notebook opened, and it was still listening on the port with the same pid.

So again I had to kill the pid on the server quickly. Before the notebook script executed on startup.