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How can I disown it a running process and associate it to a new screen shell?

I started a process from one ssh session to a target machine T. The system from which I ssh'ed, A, hung. I checked using ssh from another machine, B that the process is still running on T. Now I want to be able to restart A without affecting the run of the process on T. I had forgotten to use screen or byobu etc. Since A is currently hung, I cant even do a ctrl z and disown or something. What can be done ? I dont want the process to terminate but I want to be able to restart A which has hung.


2 Answers 2


You could try to send a SIGCONT signal to the process, but as rozcietrzewiacz mentions, you may need to do some trickery with file descriptors if the process requires terminal access.

kill -CONT pid

If this still comes up as T, then it likely needs user input.


You might modify the file descriptors attached to that process but, in general, doing so requires some a bit dirty tricks to be used. The whole concept is quite nicely covered in this question. Whether running a program like retty will succeed in your case, depends on how rigorously the process monitors the status of its own file descriptors.

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