Killing a process in linux

Question

I am trying to kill a process in linux

ps -aux
root     14074  0.0  0.4 6586120 67452 pts/0   Sl   22:45   0:01 java -cp target/cronscheduler-1.0-SNAPSHOT.jar com.cronscheduler.QuartzMain

Kill the process in the stop script using the below command

ps aux | grep "java -cp target/cronscheduler-1.0-SNAPSHOT.jar com.cronscheduler.QuartzMain" | \
grep -v grep | awk '{print $2}' | xargs kill -9

Issue is this command works fine when cronscheduler.QuartzMain is running. But when this process is already killed then the above command throws error

Usage:
 kill [options] <pid|name> [...]

Your inputs on removing the errors are appreciated

Do you want to remove the error message, or simply ignore it? — , Jul 17 '17 at 06:19
As there will be no process running you will not get any process id so final command will don't have process id — Gaurav, Jul 17 '17 at 06:26

clemens · Answer 1 · 2017-07-17T06:25:58.240

1

pkill can search through the complete command line. Try

pkill -9 -f 'java -cp target/cronscheduler-1.0-SNAPSHOT.jar com.cronscheduler.QuartzMain'

Your command may create errors, because it sends more than the pid (the complete line from ps) to kill.

edited Jul 17 '17 at 06:25

answered Jul 17 '17 at 06:22

clemens

16,716
11
50
65

Looks like you just took it from the question but normally `-9` should be avoided. – hek2mgl Jul 17 '17 at 06:25
Yes, you should use `-9` only if necessary. – clemens Jul 17 '17 at 06:27

score 0 · Answer 2 · answered Jul 17 '17 at 06:56

0

One of the solution I found was to redirect the error message : cat /etc/*.conf 2> /dev/null

answered Jul 17 '17 at 06:56

Zaks

668
1
8
30

score 0 · Answer 3 · edited Jul 17 '17 at 13:46

0

ps aux | grep httpd

httpd  3486  0.0  0.1   4248  1432 ?        S    Jul31   0:00 /usr/sbin/httpd -f /etc/httpd/httpd.conf

# kill 3486

OR

$ sudo kill 3486

edited Jul 17 '17 at 13:46

jww

97,681
90
411
885

answered Jul 17 '17 at 07:33

Sagar Parmar

1
2

score 0 · Answer 4 · edited Jul 17 '17 at 13:47

0

Please try below this will help in clearing the child process id's as well.

for i in `ps -ef| grep "java -cp target/cronscheduler-1.0-SNAPSHOT.jar com.cronscheduler.QuartzMain" | grep -v grep | awk '{print $2}'`        
do
     ptree $i|awk '{print $1}' >>pids.txt
done
for i in $(cat pids.txt)
do
     kill -9 $i
done

edited Jul 17 '17 at 13:47

jww

97,681
90
411
885

answered Jul 17 '17 at 07:43

P RAJESH

23
3

Killing a process in linux

4 Answers4