Keep a program running after closing a console, after the program has started

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How do I detach a process from Terminal, entirely?

I've a program running in a Unix console on a remote Unix computer. I (stupidly) didn't run it using nohup &, and now I need to close the local console.

Is there any way to have it keep running remotely after closing the local console?

score 11 · Accepted Answer · answered Mar 26 '10 at 13:20

11

If your shell is bash, they you can use disown. Ctrl-Z to suspend the process, then disown -h to make it not receive SIGHUP.

answered Mar 26 '10 at 13:20

Douglas Leeder

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Brilliant solution. It worked :-) – Thrawn Mar 29 '10 at 09:22
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Just curious: as the process is suspended, shouldn't this eventually be followed with `bg` or something like that? Or does `disown -h` resume it as well? – Arjan Apr 25 '10 at 15:13
Will this work if the process is running inside `screen`? I would like to continue running the process in my regular `xterm` instead. – voices Mar 19 '16 at 04:22
IIRC once disowned it won't be connected to any terminal – Douglas Leeder Mar 20 '16 at 16:31

score 5 · Answer 2 · edited Aug 05 '12 at 18:40

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On Solaris 9, you can use nohup -p <pid> to nohup a running process. Here's an interesting explanation of the implementation. I don't know if this has been implemented on any other Unices.

edited Aug 05 '12 at 18:40

alanc

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answered Mar 26 '10 at 15:02

coneslayer

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nohup: invalid option -- p Doesn't work on gentoo, ubuntu or fedora (the unixes I tried this on), but thanks nevertheless :-) Good to know Solaris has it. – Thrawn Mar 26 '10 at 18:37

score 2 · Answer 3 · answered Mar 26 '10 at 12:50

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Ctrl-Z to suspend the process, then bg to cause the program to go into the background and keep running until it completes.

answered Mar 26 '10 at 12:50

Jonathan Heady

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Problem is that if I close the console, also the background processes will stop. I need something that detaches the process from the console, like nohup does, but after the process has started :-) – Thrawn Mar 26 '10 at 12:58
And I don't think 'nohup bg &' will work either :-( – Thrawn Mar 26 '10 at 13:19
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I tried it on one of my systems and it kept running fine when I logged out (just used `du / >> temp` as the test progrm) but I understand being hesitant if you don't want to lose the program or it's results. – Jonathan Heady Mar 26 '10 at 23:17

score 2 · Answer 4 · answered Mar 26 '10 at 15:07

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If you can afford to stop the program and restart it before logging out, then stop it and restart it through screen, which is a must for anybody using remote connections to unix hosts.

answered Mar 26 '10 at 15:07

geek

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I think the main problem here is precisely that he would like to not stop the program. – Gnoupi Mar 26 '10 at 15:34
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Yeah, I would like the program not to be stopped :-) – Thrawn Mar 26 '10 at 18:32
I would highly suggest screen for future use of such a situation (I pretty much always have a screen session running on any system i have a sehll o). – Jonathan Heady Mar 26 '10 at 23:16
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Several years later, I realized I was a fool not to be using screen :-) – Thrawn Aug 27 '12 at 12:48

Keep a program running after closing a console, after the program has started

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