How do I force detach Screen from another SSH session

Question

I had Screen running inside an SSH session   Terminal froze   After restarting Terminal  that Screen session still thinks it s attached   Maybe it is   Perhaps I don t really know what that means   I d like to attach to that Screen session from a fresh SSH login   I do not want to kill that Screen session as important things are happening over there        The options I think I have   none of which I know how to solve      How do I detach that Screen session  How do I kill the SSH session that that Screen session is attached to

User · Answer

Short answer

Reattach without ejecting others: screen -x
Get list of displays: ^A *, select the one to disconnect, press d

Explained answer

Background: When I was looking for the solution with same problem description, I have always landed on this answer. I would like to provide more sensible solution. (For example: the other attached screen has a different size and a I cannot force resize it in my terminal.)

Note: PREFIX is usually ^A = ctrl+a

Note: the display may also be called:

"user front-end" (in at command manual in screen)

"client" (tmux vocabulary where this functionality is detach-client)

"terminal" (as we call the window in our user interface) /depending on

1. Reattach a session: screen -x

-x attach to a not detached screen session without detaching it

2. List displays of this session: PREFIX *

It is the default key binding for: PREFIX :displays. Performing it within the screen, identify the other display we want to disconnect (e.g. smaller size). (Your current display is displayed in brighter color/bold when not selected).

term-type   size         user interface           window       Perms
---------- ------- ---------- ----------------- ----------     -----
 screen     240x60         you@/dev/pts/2      nb  0(zsh)        rwx
 screen      78x40         you@/dev/pts/0      nb  0(zsh)        rwx

Using arrows ? ?, select the targeted display, press d If nothing happens, you tried to detach your own display and screen will not detach it. If it was another one, within a second or two, the entry will disappear.

Press ENTER to quit the listing.

Optionally: in order to make the content fit your screen, reflow: PREFIX F (uppercase F)

Excerpt from man page of screen:

displays

Shows a tabular listing of all currently connected user front-ends (displays). This is most useful for multiuser sessions. The following keys can be used in displays list:

mouseclick Move to the selected line. Available when "mousetrack" is set to on.

space Refresh the list

d Detach that display

D Power detach that display

C-g, enter, or escape Exit the list

User · Answer

try with screen -d -r or screen -D -RR

User · Answer

As Jose answered  screen -d -r should do the trick  This is a combination of two commands  as taken from the man page   screen -d detaches the already-running screen session  and screen -r reattaches the existing session  By running screen -d -r  you force screen to detach it and then resume the session     If you use the capital -D -RR  I quote the man page because it s too good to pass up      Attach here and now  Whatever that means  just do it            Note  It is always a good idea to check the status of your sessions by means of  screen -list

[linux] How do I force detach Screen from another SSH session?

Short answer

Explained answer

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