remote process run through ssh gets killed if UI is closed

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I have written a script which essentially does 2 things:



  • Runs a UI for listening to the actual program running on the server

  • remotely run the program on the server

All goes well, the UI starts, then the program is run on the server. But as soon as I close the UI the remote process gets killed.



Relevant portions of the script:



ui_pid = subprocess.check_output('/home/user/git/sim_ui.sh', shell=True)
command = 'ssh user@server "bash -c 'cd program_dir/ && echo "running program >> log.out && ./program.sh >> log.out'"'
print command 
os.system(command)


sim_ui.sh:



nohup ui_binary args > ui_out.txt &


I also am unable to find out what killed the process on the server i.e. signal which terminated the process and where it originated from.



Edit:
When I add screen -dm before bash -c it works perfectly.




ssh scripting python background-process nohup




share|improve this question





















  • I assume there is some kind of communication between the UI and the program running on the server?
    – koalo
    Jul 27 at 8:27










  • @koalo Yes. But not of the kind where the remote program terminates upon closing the UI. When I add screen -dm before bash -c everything works perfectly.
    – user3286661
    Jul 27 at 8:30










  • I could not understand, what did happen when run nohup ui_binary args > ui_out.txt &?
    – Hossein Vatani
    Jul 27 at 10:39
















up vote
0
down vote

favorite












I have written a script which essentially does 2 things:



  • Runs a UI for listening to the actual program running on the server

  • remotely run the program on the server

All goes well, the UI starts, then the program is run on the server. But as soon as I close the UI the remote process gets killed.



Relevant portions of the script:



ui_pid = subprocess.check_output('/home/user/git/sim_ui.sh', shell=True)
command = 'ssh user@server "bash -c 'cd program_dir/ && echo "running program >> log.out && ./program.sh >> log.out'"'
print command 
os.system(command)


sim_ui.sh:



nohup ui_binary args > ui_out.txt &


I also am unable to find out what killed the process on the server i.e. signal which terminated the process and where it originated from.



Edit:
When I add screen -dm before bash -c it works perfectly.




ssh scripting python background-process nohup




share|improve this question





















  • I assume there is some kind of communication between the UI and the program running on the server?
    – koalo
    Jul 27 at 8:27










  • @koalo Yes. But not of the kind where the remote program terminates upon closing the UI. When I add screen -dm before bash -c everything works perfectly.
    – user3286661
    Jul 27 at 8:30










  • I could not understand, what did happen when run nohup ui_binary args > ui_out.txt &?
    – Hossein Vatani
    Jul 27 at 10:39












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have written a script which essentially does 2 things:



  • Runs a UI for listening to the actual program running on the server

  • remotely run the program on the server

All goes well, the UI starts, then the program is run on the server. But as soon as I close the UI the remote process gets killed.



Relevant portions of the script:



ui_pid = subprocess.check_output('/home/user/git/sim_ui.sh', shell=True)
command = 'ssh user@server "bash -c 'cd program_dir/ && echo "running program >> log.out && ./program.sh >> log.out'"'
print command 
os.system(command)


sim_ui.sh:



nohup ui_binary args > ui_out.txt &


I also am unable to find out what killed the process on the server i.e. signal which terminated the process and where it originated from.



Edit:
When I add screen -dm before bash -c it works perfectly.




ssh scripting python background-process nohup




share|improve this question













I have written a script which essentially does 2 things:



  • Runs a UI for listening to the actual program running on the server

  • remotely run the program on the server

All goes well, the UI starts, then the program is run on the server. But as soon as I close the UI the remote process gets killed.



Relevant portions of the script:



ui_pid = subprocess.check_output('/home/user/git/sim_ui.sh', shell=True)
command = 'ssh user@server "bash -c 'cd program_dir/ && echo "running program >> log.out && ./program.sh >> log.out'"'
print command 
os.system(command)


sim_ui.sh:



nohup ui_binary args > ui_out.txt &


I also am unable to find out what killed the process on the server i.e. signal which terminated the process and where it originated from.



Edit:
When I add screen -dm before bash -c it works perfectly.





ssh scripting python background-process nohup





share|improve this question












share|improve this question




share|improve this question








edited Jul 27 at 8:31
























asked Jul 27 at 8:17









user3286661

1011




1011











  • I assume there is some kind of communication between the UI and the program running on the server?
    – koalo
    Jul 27 at 8:27










  • @koalo Yes. But not of the kind where the remote program terminates upon closing the UI. When I add screen -dm before bash -c everything works perfectly.
    – user3286661
    Jul 27 at 8:30










  • I could not understand, what did happen when run nohup ui_binary args > ui_out.txt &?
    – Hossein Vatani
    Jul 27 at 10:39
















  • I assume there is some kind of communication between the UI and the program running on the server?
    – koalo
    Jul 27 at 8:27










  • @koalo Yes. But not of the kind where the remote program terminates upon closing the UI. When I add screen -dm before bash -c everything works perfectly.
    – user3286661
    Jul 27 at 8:30










  • I could not understand, what did happen when run nohup ui_binary args > ui_out.txt &?
    – Hossein Vatani
    Jul 27 at 10:39















I assume there is some kind of communication between the UI and the program running on the server?
– koalo
Jul 27 at 8:27




I assume there is some kind of communication between the UI and the program running on the server?
– koalo
Jul 27 at 8:27












@koalo Yes. But not of the kind where the remote program terminates upon closing the UI. When I add screen -dm before bash -c everything works perfectly.
– user3286661
Jul 27 at 8:30




@koalo Yes. But not of the kind where the remote program terminates upon closing the UI. When I add screen -dm before bash -c everything works perfectly.
– user3286661
Jul 27 at 8:30












I could not understand, what did happen when run nohup ui_binary args > ui_out.txt &?
– Hossein Vatani
Jul 27 at 10:39




I could not understand, what did happen when run nohup ui_binary args > ui_out.txt &?
– Hossein Vatani
Jul 27 at 10:39















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