Kill all detached screen sessions

Question

When I execute screen -ls, I see the following. How can I kill all the detached sessions?

There are screens on:

    84918.tty         


        

Answer 1

'[0-9]\{3,\}'

in case of

There is a screen on:
20505.blabla    (03/05/2014 22:16:25)   (Detached)
1 Socket in /var/run/screen/S-blabla.

will match both 20505 and 2014, where quitting 2014 will return "No screen session found."

[0-9]\{3,\}\.\S*

might work.

I've always encountered pattern 20505.name, where name is either host name or session name if screen was launched with -S flag. Works on OS X and Debian, might not be universal.