I am curious. What is the issue?
- When you connect back, you no longer have access to the notebook OR
- After re-connecting, you do no see updates to the notebooks (e.g new print statements to screen)?
This is my typical workflow
- ssh into the box with port forwarding e.g
ssh -i ~/.ssh/secret.pem -L 8890:localhost:8888 ubuntu@blah.com - on remote box: start tmux sess
- within tmux sess, start notebook
- locally, open up browser to 8890
Afterwards, if you are disconnected (happens running after a 5 yr old 
more than you think!),
I have to remember to do (1) again — this is important to re-enable port forwarding again
Then, I get back my notebook (maybe have to refresh the browser). Since the actual notebook server never died on ec2, I get the notebook with any results/update while I was away