新聞財經娛樂♬資訊 News Economy

First step:
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I have checked what are the apache processes running on my machine as below

[root@localhost ~]# ps -eaf | grep -i httpd
root      2111     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2118  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2119  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2120  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2121  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2122  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2123  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2124  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2125  2111  0 19:31 ?        00:00:00 /usr/sbin/httpd
root      3254  3054  0 21:13 pts/2    00:00:00 grep -i httpd

One root owned process and remaining are the apache owned processes.By observing the PPID's of all i came to know that if we kill 2111 then all apache services will killed. So that i did the below action.

[root@localhost ~]#  ps -eaf | grep -i httpd | grep "<1>"
root      2111     1  0 19:31 ?        00:00:00 /usr/sbin/httpd

[root@localhost ~]#  ps -eaf | grep -i httpd | grep "<1>" | awk '{ print $2}'
2111

[root@localhost ~]# x=`ps -eaf | grep -i httpd | grep "<1>" | awk '{ print $2}'`
[root@localhost ~]# echo $x
2111
[root@localhost ~]# kill -9 $x

After that i checked suddenly what happens is all the processes are now owned by the init(PID-1) as below. I surprised :( :(  could you explain why? see below output.

[root@localhost ~]# ps -eaf | grep -i httpd
apache    2118     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2119     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2120     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2121     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2122     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2123     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2124     1  0 19:31 ?        00:00:00 /usr/sbin/httpd
apache    2125     1  0 19:31 ?        00:00:00 /usr/sbin/httpd

so that again i executed to kill the above processes since all were dummy as below

[root@localhost ~]# ps -eaf | grep -i httpd | grep "<1>" | awk '{ print $2}'
2118
2119
2120
2121
2122
2123
2124
2125
[root@localhost ~]# ps -eaf | grep -i httpd | grep "<1>" | awk '{ print $2}' | xargs kill -9
[root@localhost ~]# ps -eaf | grep -i httpd
root      3362  3324  0 21:27 pts/3    00:00:00 grep -i httpd
[root@localhost ~]#

but i have an error showing as below....

[root@localhost ~]# service httpd status
httpd dead but pid file exists
[root@localhost ~]#

could you explain me why?

My aim is to create a script which will clear all the dummy processes which will run by root after stopping the apache.....my script will execute in the below order.

order1 : stopping the apache

order 2 : my own script which idenfies the dummy processes and kills it

my own script contains single line :  ps -eaf | grep -i httpd | grep "<1>" | awk '{ print $2}' | xargs kill -9

order 3 : starting the apache without any issues.


Could you please advise me my script will workout or not?

Why you kill root httpd ?
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find where the exact httpd.pid file location is  and then

kill -TERM `cat /usr/local/apache/logs/httpd.pid`   ( which is my system httpd.pid location)

that can kill root httpd and other dummy http process
and you can  check it by re-run following command again

ps -eaf | grep -i httpd

and check the file (cat /usr/local/apache/logs/httpd.pid) is empty