nixCraft

kumarat9pm · #1 (**permalink**) 24-06-2009, 11:23 AM

Hi Team,
I need a shell script which will kill the orphan process and defunct process in my server. Please help.

Thanks,
Kumar

nixcraft · #2 (**permalink**) 24-06-2009, 04:38 PM

Why script? There are commands that can do same quickly:

Code:

pkill -u user processname
pkill -u www httpd
pkill -u php php-cgi

Or may be you need something else.. if so please explain in details.

kumarat9pm · #3 (**permalink**) 24-06-2009, 05:26 PM

Hi,
I am not an admin, I am new to the scripting too, Here is the snippet from server, the shell script I am looking
is to kill all the defunct process listed out in my server.Every day this should be automatically deleted at specfic time.
INDIA#ps-ef | grep defunct
aaaa 29507 29342 0 - ? 0:00 <defunct>
bbbbbbbb 23210 23089 0 - ? 0:00 <defunct>
cccccccc 27298 27287 0 - ? 0:27 <defunct>

script should be like this.
1.use ps_ef | grep defunct
2.get the process id and kill them all

jaysunn · #4 (**permalink**) 24-06-2009, 11:35 PM

Code:

#!/bin/bash

for x in ps -ef | grep defunct | awk '{print $2}' ; do

kill -9 $x

done

Please test with echo $x in your script before using kill -9 $x

This will echo out the process ID'S of the defunct processes.

Good Luck

Jaysunn

kumarat9pm · #5 (**permalink**) 29-06-2009, 11:43 AM

Hi,
The script is fine but my worry is the child Process is not killing. i have to delete the parent process to kill the defunc.

Example:

Code:

 ps -ef | grep defunc

Outputs

Code:

     root  2093  2050   0 22:51:29 pts/79      0:00 grep defunc
aaaaaaaa 25552 25537   0        - ?           0:00 <defunct>
  bbbbbbbbbb  2018  2013   0        - ?           0:00 <defunct>
  bbbbbbbbbb  5170  5152   0        - ?           0:18 <defunct>
aaaaaaaa 25548 25537   0        - ?           0:00 <defunct>
aaaaaaaa 25363 25338   0        - ?           0:00 <defunct>
aaaaaaaa 25356 25338   0        - ?           0:01 <defunct>
aaaaaaaa 25373 25338   0        - ?           0:00 <defunct>
aaaaaaaa 25791 25781   0        - ?           0:00 <defunct>
cccccccc  8478  8384   0        - ?           0:00 <defunct>
cccccccc  8466  8384   0        - ?           0:00 <defunct>
aaaaaaaa 25341 25338   0        - ?           0:00 <defunct>
cccccccc  8474  8384   0        - ?           0:00 <defunct>
  bbbbbbbbbb 22242 22232   0        - ?           0:24 <defunct>
aaaaaaaa 25539 25537   0        - ?           0:00 <defunct>
  ddddddddddd 13908 13889   0        - ?           0:00 <defunct>
aaaaaaaa 25543 25537   0        - ?           0:01 <defunct>
ddddddddddd 13952 13911   0        - ?           0:00 <defunct>
  bbbbbbbbbb 17217 17210   0        - ?           0:03 <defunct>
aaaaaaaa 25585 25579   0        - ?           0:01 <defunct>
aaaaaaaa 25813 25781   0        - ?           0:00 <defunct>
  bbbbbbbbbb 17631 17621   0        - ?           0:09 <defunct>
aaaaaaaa 25589 25579   0        - ?           0:00 <defunct>
  bbbbbbbbbb 17724 17717   0        - ?           0:02 <defunct>
  bbbbbbbbbb 18756 18745   0        - ?           0:03 <defunct>

i am not able to kill the child process which is listed above .Hence i changed the script to suport to kill the Parent Process. is this right method to kill the Parent Process?

Note: i tried manually to kill the child Process.It's is not working..

, Please let what should I do to kill the child Process instead of Parent Process.
After killing the Process I should get a mail saying these are Process got killed like that..

# vi defunc.sh

Code:

"defunc.sh" 6 lines, 99 characters 
#!/bin/bash
x=0;
for x in `ps -ef | grep defunct | awk '{print $3}'` ; do
echo $x
kill -9 $x
done

"defunc.sh" 6 lines, 98 characters
# ./defunc.sh

Code:

nixcraft · #6 (**permalink**) 29-06-2009, 11:50 AM

Use killall instead of kill:

Code:

killall -9 process-name

OR

Code:

pkill -9 -u user process-name

Edit: I see you want it by pid.. grab all pids and kill them

raj · #7 (**permalink**) 30-06-2009, 10:31 AM

Read this tread - Killing zombie process

Especially comment where a few scripts and hacks are posted by users.

PHP Code:


			
#!/usr/bin/bash

#

# Zombie Slayer

#

# zombie_slayer [OPTIONS]

#

# -d

#   Just diplay the zombie processes and exit

#

# -h | help

#   Display help

#

# Default is to show processes and the ask what to kill

#



function Z_Display

{

    echo ""

    echo "PID - PPID - State - User - Proc"

    UNIX95= ps -eo pid,ppid,state,user,comm | awk 'BEGIN { count=0 } $3 ~ /Z/ { count++; print $1,$2,$3,$4,$5 } END { print "\n" count " Zombie(s) to slay." }'

    echo ""

}



function Z_Kill

{

    read -p "Enter PPID to kill or 'exit' : " SLAY_PPID

    if [ "$SLAY_PPID" = "exit" ] || [ "$SLAY_PPID" = "" ]

    then

        exit

    fi

    ps -p $SLAY_PPID | grep -q $SLAY_PPID

    if [ $? -eq 0 ]

    then

        UNIX95= ps -o pid,user,state,comm -p $SLAY_PPID | 

        awk '$1 ~ /^[0-9]*$/ { print "The program " $4 " with PID " $1 " is being run by the user " $2 " and is currently in state " $3 }'

        read -p "Are you sure you want to kill PID $SLAY_PPID ? Y|N : " COMMIT_KILL

        if [ "$COMMIT_KILL" = "Y" ] || [ "$COMMIT_KILL" = "y" ]

        then

            kill -9 $SLAY_PPID

            echo ""

            read -p "Killed PID $SLAY_PPID. Run again? Y/N : " GO_AGAIN

        else

            Z_Kill

        fi

    else

        echo "Invalid PID. Try again."

        echo ""

        Z_Kill

    fi

}



function help

{

    echo "Usage: zombie_slayer [-h | help -d]"

    echo "-d just display zombie processes and exit"

    echo "-h | help : This help"

    exit

}



if [ "$1" = "-h" ] || [ "$1" = "help" ]

then

    help

fi



if [ "$1" = "-d" ]

then

    Z_Display

else

    Z_Display

    Z_Kill

fi

if [ "$GO_AGAIN" = "Y" ] || [ "$GO_AGAIN" = "y" ]

then

    Z_Display

    Z_Kill

fi

echo ""

kumarat9pm · #8 (**permalink**) 01-07-2009, 10:01 AM

thanks very much to all how helped me

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killing defunct and orphan process

[Solved] killing defunct and orphan process

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