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Full Discussion: Usage of NOHUP - How to keep the child process running even if I close the Server connection
Top Forums Shell Programming and Scripting Usage of NOHUP - How to keep the child process running even if I close the Server connection Post 302419640 by WinBarani on Friday 7th of May 2010 04:24:25 PM
Old 05-07-2010
Question Usage of NOHUP - How to keep the child process running even if I close the Server connection
Hi. !

When I use the 'NOHUP' along with the '&', the process will be running in the background. Even when I attempt to close (Meaning 'EXIT') the session (say PUTTY in this case), it wont exit unless the process is completed.

But, say when I forcefully terminate the session (SHUT DOWN the machine). In this case, all the child processes will be terminated and the parent process will continue.

What I need is that, even though I forcefully terminate the session, I need both the CHILD and PARENT processes to run and complete successfully.

Exact Scenario: I'm running a UNIX (Parent) shell which in turn calls an ORACLE (Child) session. When I run it with ‘NOHUP' and ‘&' and terminate the session forcefully, the ORACLE session will terminate and will give to control to the UNIX session, which will run the remaining UNIX operation.
I don't want this to happen. Even though I forcefully terminate the session, I need both the ORACLE (Child) and UNIX (parent) session to run and complete normally.

Kindly advice.

Thanks,
Barani
 

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LEARN ABOUT DEBIAN

nohup

NOHUP(1)							   User Commands							  NOHUP(1)

NAME

       nohup - run a command immune to hangups, with output to a non-tty

SYNOPSIS

       nohup COMMAND [ARG]...
       nohup OPTION

DESCRIPTION

       Run COMMAND, ignoring hangup signals.

       --help display this help and exit

       --version
	      output version information and exit

       If  standard  input is a terminal, redirect it from /dev/null.  If standard output is a terminal, append output to `nohup.out' if possible,
       `$HOME/nohup.out' otherwise.  If standard error is a terminal, redirect it to standard output.  To save output to FILE, use `nohup  COMMAND
       > FILE'.

       NOTE: your shell may have its own version of nohup, which usually supersedes the version described here.  Please refer to your shell's doc-
       umentation for details about the options it supports.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

       Report nohup bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report nohup translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2011 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for nohup is maintained as a Texinfo manual.  If the info and nohup programs are properly installed  at  your  site,
       the command

	      info coreutils 'nohup invocation'

       should give you access to the complete manual.

GNU coreutils 8.12.197-032bb					  September 2011							  NOHUP(1)
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