topic Re: background job in Operating System - HP-UX

background job

moon_5 — Mon, 16 May 2005 19:16:23 GMT

Hi all~

I tried to run background job on 11.11

but when I close terminal session,

# nohup sar -d 180 400 > sar.log &

background job also stopped.

what's the problem ??

regards
moon

Re: background job

lawrenzo_1 — Mon, 16 May 2005 19:29:57 GMT

Not sure what you are trying to do with sar -d 180 400.

When I run nohup sar -d 180 400 > sar.log & nothing happens and when I run

# sar -d 180 400

I only get the headings from the output.

you can also do

#at now
sar -d 180 400 > sar.log

this will then give you a PID witht he process running

Re: background job

Steven E. Protter — Mon, 16 May 2005 19:41:43 GMT

launch background job:

nohup jobname &

or

jobname &

exit twice in seqeuence to release the terminal session.

ps -ef | grep jobname

to see the process list.

SEP

Re: background job

moon_5 — Mon, 16 May 2005 19:58:06 GMT

Thank you for reply~

now I using #at now command but is it wrong?

#nohup sar -d 180 400 > sar.log &

then I tried to exit terminal session.

you know this message showed.

#there is running jobs

after that I exit session.

#ps -ef|grep sar -> no process

do I have to set something ??

Re: background job

Stuart Browne — Mon, 16 May 2005 21:05:32 GMT

Try this..

nohup sar -d 180 400 > sar.log &

then close your emulation session, don't 'exit'.

When you 'exit', the shell makes a reasonable attempt to kill all child processes.

What 'nohup' does, is stops a 'HUP' signal getting to your child process, not a reasonable 'TERM' or 'QUIT'. If you kill (not exit) the shell session, it isn't quite so friendly.

You can try setting 'stty -hupcl', but that probably won't help either.

Re: background job

lawrenzo_1 — Mon, 16 May 2005 22:25:15 GMT

the at now command is another way to run the job but this is by using the cron daemon.

it is find and you do not need the nohup or & as I previously stated:

# at now
sar -d 180 400 > sar.log

you can also schedule a job using at eg

at

as mentioned will run using the cron daemon.

HTH

Re: background job

moon_5 — Mon, 16 May 2005 22:52:57 GMT

thank you ~