Unuse process

[addendum]

I found that in my system , there are some strange process , it will make the system crash so I would like to control the system no such process is running ,
I found that if the system process that its process name is "ora" AND its ppid is not "2" , then it will crash the system, can suggest how to make sure the system no such kind of process is running ? thx

[Arunvijai_4]

Check your RC scripts, they are located in /etc/rc.config.d/. It seems like it is oracle process. Are you sure you dont want that to run ?

-Arun

[addendum]

thx reply ,

it is not related to "oracle" , it is "ora" that the application we use .
can suggest the script / way to do that ?

thx

[Arunvijai_4]

OK, Have you looked into your RC scripts to stop loading from startup ?

-Arun

[addendum]

the strange process is generate from our application , I would prefer to use the script to fix it because it happen in my other unix base system . thx in advance.

[RAC_1]

First, what exactly is this process?? What it does?? Is it running or hung process??

glance, select process, wait state if it is a hung process. If it is hung process, you can not kill it and reboot remains the only option.

[Arunvijai_4]

OK, then you can kill it at the startup. Edit your /etc/profile or /.profile and add the following lines,

kill -9 `ps -ae |grep -i "ora"||awk '{ print $1}'`

-Arun

[addendum]

thx RAC,

it is running process , the process is for system checking ,

thx Arunvijai,

you script seems not check the ppid , I use 'ps -ef' can find the ppid .

thx

[Vibhor Kumar Agarwal]

If it starts periodically you can add the above script in cron.

[RAC_1]

Never us signal 9 to kill process. That is a bad sysadmin practise. It just kills the process and does not do any cleanup with respect to memory and other resouces that process is using. I ususally do as follows.

kill -15 "pid"
kill -1 "pid"
kill -2 "pid"
kill -3 "pid"
kill -11 "pid"

Last resort
kill -9 "pid"

you can kill you process as follows.

UNIX95= ps -C"process_name" -o pid= | xargs kill

[Muthukumar_5]

You can get those process information as,

ps -ef | grep -i 'ora' | awk '!/COMMAND/ { if ( $2 != "2" ) { print; } }'

Is there anything in /etc/rc.log or syslog on regaring problem with this application startup.

hth.

[addendum1]

thx all help ,

in Muthukumar's script
ps -ef | grep -i 'ora' | awk '!/COMMAND/ { if ( $2 != "2" ) { print; } }'

could suggest if I want to kill the process and log what process that it has kill , what can I do ? thx

and I am not too understand what is the function of rc script , is it useful for controlling such process ? thx

[Muthukumar_5]

Script of ps -ef | grep -i 'ora' | awk '!/COMMAND/ { if ( $3 != "2" ) { print $2; }} ' will execute ps -ef command and then,

=> grep out ora with case-insensitive
=> It will remove the first line of ps -ef ouput
=> It will check for ppid not equal to 2

To track all process and killed information then,

for pid in `ps -ef | grep -i 'ora' | awk '!/COMMAND/ { if ( $3 != "2" ) { print $2; }} '`
do
kill -9 $pid
[ $? -eq 0 ] && echo "pid is killed" || echo "pid is not killed" >> /tmp/pid.log
done

cat /tmp/pid.log will give information.

hth.

[addendum]

thx Muthukumar ,

what is the use of the below string ? thx

!/COMMAND/

[addendum]

thx Muthukumar again ,

how to make your script to run 10 times per every 1 minute ? thx in advance.

[Muthukumar_5]

Use of !/COMMAND/ is,

# ps -ef
UID PID PPID C STIME TTY TIME COMMAND
root 0 0 0 Sep 20 ? 0:16 swapper

to remove first line of UID PID .. COMMAND from usage with scripting.

hth.

[Muthukumar_5]

>>how to make your script to run 10 times per every 1 minute
>>

#!/bin/ksh
# unuse.ksh
# Time to Sleep - 60 seconds / 10 times = 6 second
stime=6

while [ 1 ]
do
for pid in `ps -ef | grep -i 'ora' | awk '!/COMMAND/ { if ( $3 != "2" ) { print $2; }} '`
do
kill -9 $pid
[ $? -eq 0 ] && echo "pid is killed" || echo "pid is not killed" >> /tmp/pid.log
done
sleep $stime
done
# end

# chmod +x unuse.ksh
# ./unuse.ksh &
# tail -f /tmp/pid.log

# Use ctr + d to stop it. Or you can use crontab to schedule it accordingly. Change stime variable to suite your requirement.


hth.

[addendum1]

thx Muthukumar ,

your method is excellent , I want to have one more question , if run this script , it seems try to kill the pid that in the script running grep , like the below example , it seems try to kill the process 32612 , can suggest how to prevent the system kill it ? thx


root 758 1 0 Jul23 ? 00:02:26 ora
root 768 1 0 Jul23 ? 00:00:00 ora
root 32612 22295 0 21:45 pts/0 00:00:00 grep ora