Shell Programming and Scripting

Why do you want iostat to continue running on the server? You are redirecting its output to a file?

In the script you can try:
#===================================
nohup iostat 1 100 1>> "iostat_output.log" 2> "iostat_output.log"
#===================================

The two arguments for iostat are:
1 number of seconds between each measure
100 number of times to measure

But be careful, if you run it twice and the first time has not yet finished, the log file will be a mess.

Regards.

---------- Post updated at 11:28 ---------- Previous update was at 11:27 ----------

Ops! An error, the line can be:

In the script you can try:
#===================================
nohup iostat 1 100 1>> "iostat_output.log" 2> "iostat_output.log" &
#===================================

no im still having the same problem....i still have to press ctrl c on client server to quit.....or it quits automatically when i kill iostat on server

---------- Post updated at 09:53 AM ---------- Previous update was at 09:45 AM ----------

ssh is waiting for the termination of iostat on the destination server only then ssh exiting on its own on the client machine and comes to prompt

---------- Post updated at 10:52 AM ---------- Previous update was at 09:53 AM ----------

managed to do it by adding this to the ssh

Code:

ssh ${HOST} '/ravi/test/stat_collect.ksh start </dev/null >nohup.out 2>&1 &'

---------- Post updated at 10:53 AM ---------- Previous update was at 10:52 AM ----------

but can someone explain what i am doing here....

For me the code below is executed successfully!

No Ctrl+c needed!

Code:

# cat test.sh
#!/bin/ksh
echo "Arguments: [$*]"
echo "Starting: [iostat]..."
logFile="/<FullPathToLogFile>/iostat_output.log"
nohup iostat 1 100 1>> "${logFile}" 2>> "${logFile}" &
iostat 1 5
echo "Ending: [iostat]."
exit

Look that you need to change the variable: ${logFile} to point to the path of the log file.

I validated the execution, and after the remote call finished, the "iostat_output.log" continue increasing which means the iostat command was executing still.

---------- Post updated at 13:21 ---------- Previous update was at 13:09 ----------

About the command you asked:

Code:

ssh ${HOST} '/ravi/test/stat_collect.ksh start </dev/null >nohup.out 2>&1 &'

It uses Input/Output redirection and you can find further information in the following site: Tips For Linux - Input/Output Redirection in Unix

The trick in the command is the: "&" sign, which means the script can continue to execute without needing to wait for this command finish to execute. It is the same as I sent you!

Code:

nohup iostat 1 100 1>> "${logFile}" 2>> "${logFile}" &

thank you so much felipe.vinturin.....the method u suggested is also working....it was very helpful...