How to check dbb session is active through CLI command

[ratnamGT]

I have executed dbb session start command and setup the dbb session through DBB CLI. After some time I do not want to setup connection again and I want to check if my session is active or not ,How can I verify it via DBB CLI command if my session is already active so that I do not want to repeat all the steps again. Could you please ley me know the DBB CLI command to verify the connection?