executing shell script in background on remote machine

aggrishabh · 11-16-2011, 11:41 PM

Hi All,

i need to execute a script in background on remote machines(say 10 machines) in parallel and in return i need the pid of that process. i tried few commands like below in for loop

ssh hostname "sh abc.sh &; echo $!"
with this command prompt is hung on host machine itself then i try

ssh hostname "sh abc.sh &; echo $!" &
but no luck ssh is going in back ground

any help will be highly appreciated.

NOTE: to some of u it look like homework but i search internet but not able to find proper answer.

chrism01 · 11-17-2011, 12:08 AM

Try with nohup

Code:

ssh hostname "nohup ./abc.sh &; echo $!"

CAUTION: Untested ...

PS I advise setting the shebang line at the top of the sh file & turn on execute perms, then you don't need to 'sh blah.sh'

aggrishabh · 12-12-2011, 09:02 PM

Sorry for replying late

i got chance to test this code (ssh hostname "nohup ./abc.sh &; echo $!")today only, it didn't work until the slight modification

ssh hostname "`nohup ./abc.sh &`; echo $!"

otherwise it will give below error
bash: -c: line 0: syntax error near unexpected token `;'

any other idea Please.

frankbell · 12-12-2011, 09:14 PM

You might take a look at cluster ssh. I'm not sure it is simultaneous, but it's closest to what you are looking for that I have heard of so far.