By Jack Szwergold • September 27, 2015

Install screen:

sudo aptitude install screen

Create a screen named test_screen.

screen -S test_screen

List all open screens.

screen -ls

The output would be.

There is a screen on:
        2839.test_screen        (09/27/2015 02:48:00 AM)        (Attached)
1 Socket in /var/run/screen/S-sysop.

So if you wanted to reattach to that session, just enter this line.

screen -D -r '2839.test_screen'

The -D detaches the screen session and then the -r reattaches the session.