topic Re: Killing a process witha script PART 2 in Operating System - Linux

Killing a process witha script PART 2

TheJuiceman — Wed, 22 Feb 2006 20:14:57 GMT

Hey guys,

I'm using the suggestion from my previous post...

PID=(ps -ef|grep <[P]rocess> | awk '{print $2}')

to get the PID of a process that is running so I can execute a kill on it. This seemed to work the first time I ran it. Now I am getting a set of 3 numbers in my return, such as "12345 67890 09877". How can I correct this? Thanks.

Re: Killing a process witha script PART 2

Bill Hassell — Wed, 22 Feb 2006 20:46:11 GMT

Try NEVER to use grep and ps together! ps has many, many options and one of them eliminates the need for grep completely when you are looking for a specific process. Use the -C option to find exactly the process you are looking for:

UNIX95=1 ps -C -o pid=

Now the above eliminates both grep and awk because ps can provide all you need. As far as having multiple PID's returned, with the above examp[le, it means that there are multiple copies of the program running. To see them in detail, just change -o pid to -f.

Re: Killing a process witha script PART 2

Muthukumar_5 — Wed, 22 Feb 2006 23:41:14 GMT

If you are using ps -ef then try negate with grep -v grep when using grep with it.

Simply,

PID=$(ps -ef | gre[ <[P]rocess> | grep -v grep | awk '{ print $2; })

However, It is not always useful. Try to use UNIX95 format. That is good.

--
Muthu

Re: Killing a process witha script PART 2

Arunvijai_4 — Wed, 22 Feb 2006 23:47:10 GMT

Hello,

It is not good practice to club "ps" and "grep" together, UNIX 95 variable which bill said is the best method.

# UNIX95= ps -C"exact_process_name" -o pid

-Arun

Re: Killing a process witha script PART 2

TheJuiceman — Thu, 23 Feb 2006 20:57:42 GMT

Thank you all again!!!

Re: Killing a process witha script PART 2

Nguyen Anh Tien — Thu, 23 Feb 2006 21:16:05 GMT

above of all. I prefer Unix95 format
# UNIX95= ps -C"exact_process_name" -o pid

Re: Killing a process witha script PART 2

TheJuiceman — Thu, 23 Feb 2006 21:19:30 GMT

closed