Using ping's return in a shell script

brgsousa · 05-19-2008, 09:54 AM

hi,
I am writing a shell script for debian that monitors network servers. This script must ping the hosts periodically. It should use ping's output for the monitoring. How can I obtain the time response average and the number of sucessful pings, so that i can use these numbers in the script?

Thanks

jf.argentino · 05-19-2008, 10:08 AM

Maybe something like:

Code:

#!/bin/sh
PING_OUT=`ping -c "$NB_OF_PING" -q "$IP_ADDR"`
min=`echo "$PING_OUT" | awk -F"/" '{print $4}'`
avg=`echo "$PING_OUT" | awk -F"/" '{print $5}'`
max=`echo "$PING_OUT" | awk -F"/" '{print $6}'`
mdv=`echo "$PING_OUT" | awk -F"/" '{print $7}'`
# then $min, $avg, $max and $mdv are the ping output

but i'm not sure you can do arithmetic on float numbers, maybe you have to use bc

brgsousa · 05-28-2008, 01:51 PM

Thanks man, it really worked.
I had a doubt about mdev. what is this?

pixellany · 05-28-2008, 02:19 PM

Do you mean this?
min/avg/max/mdev = 1.713/1.713/1.713/0.000 ms

It looks like mdev is the deviation---ie the amount of spread in the distribution. What does "man ping" say?