me@iupr-serv8:~$ screen -r There are several suitable screens on: 25028.pts-19.XXX-serv8 (01/05/2012 07:15:34 PM) (Attached) 24658.pts-19.XXX-serv8 (01/05/2012 07:11:38 PM) (Detached) 24509.pts-19.XXX-serv8 (01/05/2012 07:10:00 PM) (Detached) 18676.pts-5.XXX-serv8 (01/02/2012 06:55:33 PM) (Attached) Type "screen [-d] -r [pid.]tty.host" to resume one of them. me@XXX-serv8:~$ screen -r 25028 There is a screen on: 25028.pts-19.XXX-serv8 (01/05/2012 07:15:33 PM) (Attached) There is no screen to be resumed matching 25028.
-d|-D [pid.tty.host] does not start screen, but detaches the elsewhere running screen session. It has the same effect as typing "C-a d" from screen's controlling terminal. -D is the equivalent to the power detach key. If no session can be detached, this option is ignored. In combination with the -r/-R option more powerful effects can be achieved: -d -r Reattach a session and if necessary detach it first. -d -R Reattach a session and if necessary detach or even create it first. -d -RR Reattach a session and if necessary detach or create it. Use the first session if more than one session is available. -D -r Reattach a session. If necessary detach and logout remotely first. -D -R Attach here and now. In detail this means: If a session is running, then reattach. If necessary detach and logout remotely first. If it was not running create it and notify the user. This is the author's favorite. -D -RR Attach here and now. Whatever that means, just do it.