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Can I nohup/screen an already-started process?

GNU screen is great for long running programmes. You can start your programme in it and disconnect and bring your laptop home.

However sometimes I start a programme outside screen and it takes longer than I want. I have no problem with pausing the programme using Control - Z etc., however I don't want to restart it cause then it'll take ages to run again. Is there some way I can move an existing running process into a screen session?

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marked as duplicate by splattne Aug 4 '09 at 19:20

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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Dupe: serverfault.com/questions/24425/… –  Murali Suriar Aug 4 '09 at 16:50
    
Yes you can. Reptyr was made just for that purpose: serverfault.com/a/284795/235596 –  newUserNameHere Sep 27 at 18:31

2 Answers 2

up vote 2 down vote accepted

No, sorry, you can't.

Furthermore I do the same as David Mackintosh. Where ever I am, I start my screen (although I use screen -x). Almost everything I do on my server is running inside my screen, with about 20 screen windows open.

In that case, it will not mind if something is taking a bit longer.

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yes you can do it, use reptyr, see: serverfault.com/a/284795 –  rubo77 May 14 '13 at 17:26

I think the answer is "no".

After having some horrible experiences with poor wireless connectivity and long-running processes, I reflexively run EVERYTHING in screen sessions now. My first command on connecting to a system is nearly always

$ screen -ADR

...and I go from there.

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