[SOLVED] Bash script unable to exit from shell after executing over SSH

nareshreddyn · 09-11-2018, 07:11 AM

Bash script unable to exit from shell after executing over SSH.Need to manually enter CTRL+C to exit.

Tried placing /dev/null 2>&1 & in the script which is working fine.But i need to write the ouput to LOGFILE.

Please help

Code:

ssh ${appUsr}@${adminHost} "cd $svrscript; ls -ltr; ./startup_WL.sh start" >> ${LOG_FILE}

BW-userx · 09-11-2018, 07:15 AM

did you try using just the ampersand, & to put it into the background?

Code:

.....  ./startup_WL.sh start" >> ${LOG_FILE} &

something like that?

nareshreddyn · 09-11-2018, 07:24 AM

Yes.. That will work but the next commands on local script are executed without the completion of SSH execute command. I want to execute the next lines of script on my localhost once the ssh script is executed.

After starting all the servers on remote host, i will capture the status of each server in LOGFILE. If i place &, i am unable to get the status.

Code:

echo  "#####################################"
echo  "Starting All Servers" >> ${LOG_FILE}
echo  "#####################################"
ssh  ${appUsr}@${adminHost} "cd $svrscript; ls -ltr; ./startup_WL.sh start" >> ${LOG_FILE}

sleep 10;

echo "Servers are Starting.Please wait" >> ${LOG_FILE}

echo "################################"
echo " Server Status " >> ${LOG_FILE}
echo "################################"
ssh ${appUsr}@${adminHost} "cd $svrscript; ls -ltr; ./startup_WL.sh status" >> ${LOG_FILE}

Turbocapitalist · 09-11-2018, 07:27 AM

Remove the -f from that line because it sends the SSH client into the background just before command excution. So the client stays in the background and does not return. See "man ssh" for details.

nareshreddyn · 09-11-2018, 07:33 AM

Sorry there is no f option.I just gave a try to check.Thanks for the finding

Turbocapitalist · 09-11-2018, 07:36 AM

What happens when you run "./startup_WL.sh status" by itself manually? Does it even exit? If it fails to exit, then the SSH client won't exit either when it runs it.

nareshreddyn · 09-11-2018, 07:43 AM

Yes. I am able to exit when i run it manually or over SSH for "./startup_WL.sh status"

For "./startup_WL.sh start" manually its working but over SSH able to exit from the script but not from the shell and return back to local host.

pan64 · 09-11-2018, 07:55 AM

so probably you need to fix that shell script. try ssh -t

NevemTeve · 09-11-2018, 09:25 AM

Guess the starting script might write some lines to the original standard output/error, before redirecting them to files,
and you want to save those lines.

Perhaps something like this:

Code:

ssh -t user@host 'trap "" HUP; /path/startbatch.sh & sleep 10' >>/path/remotestart.log