howto kill x if x is running?

Polytropon freebsd at
Sun Sep 15 06:47:23 UTC 2013

On Sat, 14 Sep 2013 23:20:46 -0700, Gary Kline wrote:
> 	say that I have a utility xxx running sometimes.  xxx is
> 	soaking up a chunk of my load.  I have to use top to find if
> 	xxx is running, then kill -9 to kill xxx and have a steady load of,
> 	say, between 0.10 and 0.15.  what's the script that can do this?

Quick and dirty, needs adjustments. Repeat the following
(endless loop, depending on the shell you're using):

	top -n | awk '/%/ { load=$11; sub("%", "", load); sub("\\.", "", load); if(load > 1000 && load < 1500) print $1 }' | xargs kill -9

The margin is coded in the conditional: 1000 means 10.00% WCPU
(load 0.10), 1500 means 15.00% WCPU (load 0.15). You will have
to set the "valid load" accordingly.

Done some minor testing, killed my media player (as expected).
I'm sure someone will present a much better, less dirtier
approach to accomplish the requested task. :-)

Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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