Getting the pid of a job launched in the background remotely

Question

I am trying to launch in the background a job on a remote machine and get its PID so that I can kill it later on. What I have come up with so far is the following: ``` #!/bin/bash IP=xxx.xxx.xxx.xx REMOTE_EXEC="ssh $IP -l root" # The following does NOT work, I am trying to get the PID of the remote job PID=`$REMOTE_EXEC 'vmstat 1 1000 > vmstat.log & ; echo $!'` # Launch apache benchmark ab -n 10 http://$IP/ $REMOTE_EXEC "kill $PID" ``` Unfortunately it does not work. I am getting a ``` bash: syntax error near unexpected token `;' ``` but I don't know what the right syntax would be.

Accepted Answer

You got the error, because you ';' is redundant, try 'vmstat 1 1000 > vmstat.log & echo $!'

But I am not sure it gonna work, because after you logout, the process will receive SIGHUP. Look at nohup(1).

Getting the pid of a job launched in the background remotely

Solution

Problem