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Syntax error with ps command

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# 1  
Old 01-20-2017
RedHat Syntax error with ps command
i am trying the blow command in vain on Linux Terminal.

Code:
kill -9 `ps -eaf | grep weblogic.NodeManager | grep wls103 | awk '{print $2}'`
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]

kill -9 $(ps -eaf | grep weblogic.NodeManager | grep wls103| awk '{print $2}')
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]

kill -9 ps -eaf | grep weblogic.NodeManager | grep wls103 | awk '{print $2}'
bash: kill: ps: arguments must be process or job IDs

Can you please suggest what will work ?
# 2  
Old 01-20-2017
This begs the question, what is the output of ps -eaf | grep weblogic.NodeManager | grep wls103 | awk '{print $2}' ?

...which you could reduce to ps -eaf | awk '/weblogic.NodeManager/ && /wls103/ { print $2}' anyway.

Also, why are you running kill -9? Have you attempted to give this job a chance to quit gracefully before trying the nuclear option?
This User Gave Thanks to Corona688 For This Post:
rbatte1
# 3  
Old 01-20-2017
Error
Quote:
Originally Posted by Corona688
This begs the question, what is the output of ps -eaf | grep weblogic.NodeManager | grep wls103 | awk '{print $2}' ?

...which you could reduce to ps -eaf | awk '/weblogic.NodeManager/ && /wls103/ { print $2}' anyway.

Also, why are you running kill -9? Have you attempted to give this job a chance to quit gracefully before trying the nuclear option?
The output of ps -eaf | grep weblogic.NodeManager | grep wls103 | awk '{print $2}' is 10997 which is the pid i wish to kill -9 on purpose.

can you please suggest why my commands fails as shown in the OP Post#1
# 4  
Old 01-20-2017
Probably because the PID you're looking to kill doesn't exist. Either that, or ps looks different on your system than the system this came from.

I repeat, why kill -9? This is usually a bad idea.
# 5  
Old 01-20-2017
I'm pretty sure this has been suggested before, but running a command with the shell's xtrace option set will explicitly show HOW the command is called and HOW its parameters are expanded.
# 6  
Old 01-20-2017
Specifically, your first command would have worked if your long pipe chain had actually printed a PID.

Your second command would also have worked if your long pipe chain had actually printed a PID.

The third is obviously wrong.

So the question is, what is that long pipe chain of yours doing.
# 7  
Old 01-21-2017
The grep and awk appear in the ps list, so ps *can* find them (race condition). Escape your search expressions, so they are not matching in the arguments.
Put one character in [ ] to achieve that.
With only awk
Code:
pids=`ps -eaf | awk '/[w]eblogic.NodeManager/ && /[w]ls103/ {print $2}'`
[ -n "$pids" ] && kill $pids
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