kill Process inquires --need help

MODYSAMA · 03-10-2011, 08:37 AM

Hello,
I have many question. It'd be great to get reply.
OS: Kubuntu 10.10

Code:

sok@sok-HP-ProBook-4520s:~$ pidof motion
24986
sok@sok-HP-ProBook-4520s:~$ pidof 24986
sok@sok-HP-ProBook-4520s:~$ sudo su
root@sok-HP-ProBook-4520s:/home/sok# kill 24986
root@sok-HP-ProBook-4520s:/home/sok# pidof /bin/sh /home/sok/Scripts/check.sh
24982 7386 3749 3590 1439
root@sok-HP-ProBook-4520s:/home/sok# kill 24982
root@sok-HP-ProBook-4520s:/home/sok#

Q1: Why pidof /bin/sh /home/sok/Scripts/check.sh
return several ids and the first one only is one, which is used to kill the process.
Q2: What is that several ids stand for?
Q3: Why being not root can't always kill a specified process?
.
Thanks in advance.

siranjeevi · 03-10-2011, 09:09 AM

Hi,

Here are your answers,

Q1, and Q2 -- I think that the first one is Parent process[PPID] and the remaining is your child processes, a single process will divide into multiple small processes. But I am not sure, may be someone will come up with answers for you.

Q3 -- You need to be a root user to kill many processes because those process may be running with a different user permission, say if another user "sam" is using a process, he is the owner of the process and you cannot kill his process. Only a root user can do that.

MODYSAMA · 03-10-2011, 09:48 AM

Thank you.

Quote:

Originally Posted by siranjeevi

Q3 -- You need to be a root user to kill many processes because those process may be running with a different user permission, say if another user "sam" is using a process, he is the owner of the process and you cannot kill his process. Only a root user can do that.

Even there is only one user?

---------- Post added 03-10-11 at 10:48 AM ----------

Q4: Why the system of one user doesn't be consider that user as root?

siranjeevi · 03-10-2011, 10:52 AM

Hi,

BY default linux creates some users while you install OS. Some of those user processes cannot be killed by a normal users, the following are some default users which i pasted from "/etc/passwd" file.

Quote:

root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
bin:x:2:2:bin:/bin:/bin/sh
sys:x:3:3:sys:/dev:/bin/sh
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/bin/sh
man:x:6:12:man:/var/cache/man:/bin/sh
lp:x:7:7:lp:/var/spool/lpd:/bin/sh
mail:x:8:8:mail:/var/mail:/bin/sh
news:x:9:9:news:/var/spool/news:/bin/sh
uucp:x:10:10:uucp:/var/spool/uucp:/bin/sh
proxy:x:13:13

roxy:/bin:/bin/sh

MODYSAMA · 03-10-2011, 12:22 PM

siranjeevi,
Thank you a lot for being helpful.

Quote:

Originally Posted by MODYSAMA

OS: Kubuntu 10.10

Code:

sok@sok-HP-ProBook-4520s:~$ pidof motion
24986
sok@sok-HP-ProBook-4520s:~$ pidof 24986
sok@sok-HP-ProBook-4520s:~$ sudo su
root@sok-HP-ProBook-4520s:/home/sok# kill 24986
root@sok-HP-ProBook-4520s:/home/sok# pidof /bin/sh /home/sok/Scripts/check.sh
24982 7386 3749 3590 1439
root@sok-HP-ProBook-4520s:/home/sok# kill 24982
root@sok-HP-ProBook-4520s:/home/sok#

Q1: Why pidof /bin/sh /home/sok/Scripts/check.sh
return several ids and the first one only is one, which is used to kill the process.
Q2: What is that several ids stand for?
.

Any suggestion, please??

MODYSAMA · 03-10-2011, 02:52 PM

Please, need reply.

siranjeevi · 03-10-2011, 04:32 PM

Looks like no one is replied, okay I will try to resolve you.

Can you paste the output of

Quote:

ps -el |grep firstpidofprocess

?

MODYSAMA · 03-11-2011, 06:00 AM

Thank you.
If you mean that

Code:

sok@sok-HP-ProBook-4520s:~$ ps -el | grep firstpidofprocess
sok@sok-HP-ProBook-4520s:~$

Code:

root@sok-HP-ProBook-4520s:/home/sok# ps -el | grep firstpidofprocess
root@sok-HP-ProBook-4520s:/home/sok#

It list nothing.
!
sorry for my bad.

siranjeevi · 03-11-2011, 06:09 AM

Sorry the "firstpidofprocess" in the sense the pid number (i.e) in your previous o/p "24986"

So the command should be

Quote:

ps -el |grep 24986

MODYSAMA · 03-11-2011, 07:16 AM

Here it is,

Code:

sok@sok-HP-ProBook-4520s:~$ pidof motion
1205
sok@sok-HP-ProBook-4520s:~$ sudo su
[sudo] password for sok: 
root@sok-HP-ProBook-4520s:/home/sok# ps -el | grep 1205
0 S  1000  1205  7985  1  80   0 - 12088 hrtime ?        00:00:01 motion
root@sok-HP-ProBook-4520s:/home/sok#

siranjeevi · 03-11-2011, 10:34 PM

Hello,

Please post the o/p of

Quote:

root@sok-HP-ProBook-4520s:/home/sok# pidof /bin/sh /home/sok/Scripts/check.sh

along with this, so your next post should be o/ps of,

Quote:

sok@sok-HP-ProBook-4520s:~$ pidof motion
o/p
sok@sok-HP-ProBook-4520s:~$ sudo su
[sudo] password for sok:
root@sok-HP-ProBook-4520s:/home/sok# ps -el | grep 1205
o/p
root@sok-HP-ProBook-4520s:/home/sok#
root@sok-HP-ProBook-4520s:/home/sok# pidof /bin/sh /home/sok/Scripts/check.sh
o/p

MODYSAMA · 03-12-2011, 07:48 AM

Code:

sok@sok-HP-ProBook-4520s:~$ sudo su
[sudo] password for sok: 
root@sok-HP-ProBook-4520s:/home/sok# pidof motion
32536 1948
root@sok-HP-ProBook-4520s:/home/sok# ps -el | grep 32536
0 S  1000 32536 32294  0  80   0 - 11430 hrtime ?        00:00:01 motion
root@sok-HP-ProBook-4520s:/home/sok# pidof  /bin/sh /home/sok/Scripts/check.sh
32532 32188
root@sok-HP-ProBook-4520s:/home/sok# ps -el | grep 32532
0 S  1000 32532 32294  6  80   0 -   474 pipe_w ?        00:01:15 sh

siranjeevi · 03-12-2011, 07:52 AM

Hi,

It seems that the other pids doesn't come with same parent process ids, so they don't belong to same process. Not sure why multiple processes are being created for single process. Sorry.!..

MODYSAMA · 03-12-2011, 11:14 AM

siranjeevi,
It'S okey.Many Thanks for you.