I have open tunnel with
ssh -2 -N -L 5001:localhost:1019 firstname.lastname@example.org
The tunnel is working good, but I have to Ctrl+C or Ctrl+D to force quit the tunnel. How can I close the tunnel gracefully?
SSH has a escape sequence to reset the connection, it will probably work for what you want. Press enter, then
It also works when you have a hanged SSH connection (like a connection that timed out but didn't close), just press enter (I have an habit to press it more than once) and the tilde-dot sequence to close it.
Some useful ones:
Close whatever is connected with the other side through the ssh connection first.