topic kill process in Operating System - HP-UX

kill process

Michael_33 — Wed, 22 May 2002 00:08:06 GMT

Hi All,

I want to kill all process which the owner is user1,how should I do?

Thanks!

Re: kill process

Michael Tully — Wed, 22 May 2002 00:12:08 GMT

Hi,

This should kill all processes related to user1. If the first one doesn't work the second should. You must be 'root' to perform this function properly.

# ps -ef | grep user1 | awk '{print $2}' | xargs kill -5
# ps -ef | grep user1 | awk '{print $2}' | xargs kill -9

Cheers
~Michael~

Re: kill process

steven Burgess_2 — Wed, 22 May 2002 00:15:04 GMT

Hi

I use the following script which will prompt you for a username

echo "\nkill process script"
echo "====================="

listfile1=/tmp/rm_process.list
listfile2=/tmp/rm_process.list2
sleep 1
echo "Please enter you choice of process"
read choice

rm -f $listfile1 $listfile2 2>&1

ps -ef | grep $choice | cut -c10-15 > $listfile1
sed 's/^/kill -15/g' $listfile1 > $listfile2
chmod 777 $listfile2
$listfile2

echo "\nkill process script ends"

Regards

Steve

Re: kill process

Michael_33 — Wed, 22 May 2002 00:19:53 GMT

thanks!

one more question:

I found the cron daemon is start by user1!
I try to kill -9 pid, but doesn't work! how should I do?

Re: kill process

steven Burgess_2 — Wed, 22 May 2002 00:22:20 GMT

Hi

/sbin/init.d/cron stop

to restart

/sbin/init.d/cron start

Regards

Steve

Re: kill process

steven Burgess_2 — Wed, 22 May 2002 00:24:32 GMT

Michael

I picked up this info from 'Bill Hassell'
regarding processes. Have a read it's very interesting

Steve

Re: kill process

Michael_33 — Wed, 22 May 2002 00:24:33 GMT

Hi Steven,

I did this already, but doesn't work. Any idea?

Re: kill process

steven Burgess_2 — Wed, 22 May 2002 00:25:30 GMT

Hi

Can you post the output of your

ps -ef | grep cron

Cheers

Steve

Re: kill process

Michael_33 — Wed, 22 May 2002 00:28:41 GMT

user1 17290 1 07:56 ? /usr/sbin/cron

Re: kill process

steven Burgess_2 — Wed, 22 May 2002 00:36:30 GMT

Hi

It looks as though the process appears to be hung, when you look at it from top, is it sleeping ? If so the kill may be ignored

I've done a quick search and found the following doc

A reboot may sound a little drastic but may cure the problem

http://forums.itrc.hp.com/cm/components/FileAttachment/0,,0x4c04a22d6d27d5118fef0090279cd0f9,00.htm

Have a read through

Regards

Steve

Re: kill process

Michael Tully — Wed, 22 May 2002 00:44:41 GMT

Hi,

That is a very interesting document, and the information is a good starting point. Rarely have I seen a 'hung' cron process. In saying that the 'cron' process should run as user 'root'. Is that the case on your system, using 'user1' as an example?

Is the 'cron' process still logging jobs to the cron log? (/var/adm/cron/log)

I agree, that the last resort will be a system reboot.

Michael

Re: kill process

Michael_33 — Wed, 22 May 2002 00:45:21 GMT

no other way, only reboot?

Re: kill process

Michael_33 — Wed, 22 May 2002 00:57:15 GMT

Michael, you are right, user1 just an example.
the cron's log is stopped already.
but the cron daemon is still running, maybe
hung already. kill -9 doesn't work, the value
of w is >100!

Re: kill process

Michael Tully — Wed, 22 May 2002 00:58:05 GMT

Hi Michael,

If there are critical jobs from cron that need to run, try to run them manually until you can schedule a system reboot. I see no other alternative, if the cron process has 'hung'.

Good Luck
~Michael~

Re: kill process

steven Burgess_2 — Wed, 22 May 2002 01:07:31 GMT

Hi

Just had major issues attempting to reply

As per Micheal's comments, run the jobs manually. The doc states

NOTE: Only restarting the machine can free up the resources used by
a hung unsignalable process.

CAUTION: Anytime you have unkillable processes issuing a shutdown command
may cause the system to hang during shutdown. The reboot command
is a better alternative. Use reboot(1m) after stopping all
processes (See killall script) and umounting all filesystems that
can be umounted.

Note: using reboot, killall is in /sbin/init.d

Good luck

Steve

Re: kill process

Michael_33 — Wed, 22 May 2002 01:09:31 GMT

Thanks all!

Re: kill process

Michael Tully — Wed, 22 May 2002 01:25:41 GMT

Hi Michael,

Now would also be a perfect opportunity to look at planning for the future and to patch your system(s). Given that a hung process can also be an unexpected condition in the system kernel may indicate that there is a bug.

HTH
~Michael~

Re: kill process

Trevor Roddam_1 — Thu, 23 May 2002 01:25:18 GMT

I would also check the passwd file for users with UID 0 other than root.
Just in case.

Re: kill process

steven Burgess_2 — Thu, 23 May 2002 01:35:11 GMT

Hi

Very good point

Steve

Re: kill process

Jack Werner — Thu, 23 May 2002 14:19:07 GMT

I'm going to take this oppurtunity to repeat a mantra of mine. When will someone request POSIX to change the kill command so it doesn't require the "approval" of the intended victim? If a process is not "signalable" and is the desired target of "kill", then the kill command should remove the victim from the process stack. The system termination cleanup module should have logic sufficient to perform this task. Another approach would be to have the kill command "spoof" the completion of whatever the victim might be waiting for. Then, when his head pops up, give him a 357 between the eyes. Rebooting is an uacceptable option to kill a rogue process