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Full Discussion: Executing statements inside forloop parallely
Top Forums UNIX for Beginners Questions & Answers Executing statements inside forloop parallely Post 303016576 by bakunin on Sunday 29th of April 2018 04:48:27 PM
Old 04-29-2018
Quote:
Originally Posted by Kamesh G
Also the preferrable mode is to run it as "nohup ./script.sh &" . Can you help me how to log all the outputs from the script ????
The real question is not where the output goes (when you start a process with nohup per default its output goes to ./nohup.out) but where the input is supposed to come from.

When you start a process on the commandline this commandline is displayed in a terminal. Per default input comes from this terminal (the keyboard) and output goes to this terminal (the screen). Starting a process with nohup cuts this connection to a terminal - actually this is the whole point of nohup: allowing a process to continue even if its terminal is closed ("hangs up").

Bottom line: if you want to start the process with nohup you need something which replaces the terminal as a source of input. That can be some file, a named pipe or whatever - but something has to be there and you need to use redirection to make the process use this instead of waiting indefinitely.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
Kamesh G
 

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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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