topic Re: need help with embedded script within remote shell script in Operating System - Linux

need help with embedded script within remote shell script

Matt Shaffer_1 — Tue, 31 Jan 2006 16:52:06 GMT

I have a remote script (rsh) that is going out to multiple locations and doing multiple jobs. The last thing that it does is copy out a script to the remote location and then execute the script. This embedded script takes about 1.5 hours to run so I want my main script to copy over this script, execute it but then move on and loop through again, hitting the next location in the list. Is this possible?

Re: need help with embedded script within remote shell script

David Kiel — Tue, 31 Jan 2006 17:35:02 GMT

If you don't need to monitor the output from the remote location you could use

rsh remotehost "at -f script now"

to start the remote job without waiting.

Re: need help with embedded script within remote shell script

renarios — Wed, 01 Feb 2006 02:34:19 GMT

Hi Matt,

You could start scripts in the background using the ampersant sign (&). For example:

for i in srv1 srv2 srv3
do
rsh ${i} .... &
done
, or for the readability do it with functions:

function remote_script
{
#do the things you want to do
)

for i in srv1 srv2 srv3
do
remote_script &
done

Cheers,

Renarios

Re: need help with embedded script within remote shell script

Bill Thorsteinson — Wed, 01 Feb 2006 10:14:37 GMT

Have you looked at something like cfengine.
You could have it copy and execute the
script.

Re: need help with embedded script within remote shell script

Matt Shaffer_1 — Wed, 01 Feb 2006 16:48:49 GMT

I tried the "&" idea before and that does not work. I think the at -f will work although I haven't done a full blown test yet.

Re: need help with embedded script within remote shell script

Muthukumar_5 — Thu, 02 Feb 2006 00:43:51 GMT

You try as,

for server in "server1 server2 server3"
do

remsh -l root ${server} -n "script" 1>&- 2>&- &

done

It will do it. &- is used to close error and output mode. Else it will interact with other shell execution.

--
Muthu

Re: need help with embedded script within remote shell script

renarios — Thu, 02 Feb 2006 03:00:51 GMT

Hi Matt,

I tried the following and it works OK

function rem_dbcheck
{
ssh ${i} -n /home/oracle/rene/dbstatus.sh
}

for i in srv1 srv2 srv3 srv4
do
rem_dbcheck 1>/tmp/db.log 2>&1 &
done

Cheers,
Renarios

Re: need help with embedded script within remote shell script

Matt Shaffer_1 — Tue, 30 Nov 2010 20:21:53 GMT

. using & to run it in the background worked. i'm sure i had my syntax wrong or something. didn't know much 5 years ago.