topic Re: Run script in background as process in Operating System - HP-UX

Run script in background as process

N Gopal — Fri, 22 Feb 2008 13:15:46 GMT

Hi,

I am having one .scr script. I want to run it as background process means once it is scheduled it will running like deamon i am not bother to run it manuaaly.
Can anyone suggest me how to do it please?

Thanks

Re: Run script in background as process

Hein van den Heuvel — Fri, 22 Feb 2008 14:12:15 GMT

Typically you would use 'cron' for jobs which 'end' and should be scheduled at set intervals.

And you would use 'init' for jobs to be launched when the system is started.

Please read up on the manpages for cron and init and look for examples on your system.
If you have further, detailed questions, after trying some, please elaborate with the exact commands tried and the (exact) problems (error messages) you experienced.

Good luck!
Hein.

Re: Run script in background as process

Michael Steele_2 — Fri, 22 Feb 2008 15:01:05 GMT

From the command line: nohup script &
From cron: # # # # # script &
Refer to '&' meta characters in korn shell, C, Poxis, etc.

Re: Run script in background as process

Jeff_Traigle — Fri, 22 Feb 2008 17:04:35 GMT

Create an infinite loop in the script. The following is a piece of a script we use as part of a "poor man's" failover environment that I implemented.

while true
do
/failover/rsync.sh ${RSYNC_CFG}
sleep ${INTERVAL}
done

Re: Run script in background as process

Laurent Menase — Fri, 22 Feb 2008 18:07:56 GMT

nohup toto /dev/null &
the redirection can be explicit to /dev/null, a file or a pipe, but if still tty, output will be redirect to $HOME/nohup.out

Re: Run script in background as process

N Gopal — Mon, 25 Feb 2008 06:56:15 GMT

Hi All,

Apologies for late reply. Thanks for your valuable reply.
nohup script & is working for me.

Thanks

Re: Run script in background as process

Mark Ellzey — Mon, 25 Feb 2008 16:50:54 GMT

Hello,

I have always followed the following conventions when running 'persistant' scripts:

1. If the script does not absolutly need to run when the machine is rebooted, allow a user with sufficient permissions to start the script. I usually write a short shell wrapper so the user doesn't have to worry about the details of the script.

2. If the script must be started each time the machine is rebooted, you have 2 choices:
a. an rc script which will start the process on reboot - or -
b. an entry in the /etc/inittab file.

Which method I use is determined by the the following:
1. If the script needs to be running at all times, I use /etc/inittab with the 'respawn' option.
2. If it can fail or be terminated without causing a major problem, I use the rc start-up method.

Just my 2cts. worth

Mark

Re: Run script in background as process

Vivek Bhatia — Wed, 27 Feb 2008 12:12:57 GMT

Hi Gopal,

Go through this link.

This will guide you with examples for scheduling the scripts.

http://www.adminschoice.com/docs/crontab.htm

Thanks
Vivek Bhatia