screen -S <your_session_name>
If your remote connection crashed while you had an open screen session you have to detach it before you can reconnect. You do it this way:
Reattach a session and if necessary detach it first.
screen -d -r <session_name>
To rename a session do:
:sessionname <your_session_name>– yes, the first colon is needed there, no extra spaces