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How to check ICMP code through shell script?

Hello to everyone.

I need to run a script so that I can check if a machine is still running. If somehow it goes offline then the machine which is making the check take its place, by changing its IP.
Can someone help me out with that?

you have to do some work with shell scripting i don't know the exact syntax at the moment so i am giving a hint at this time.(just like a psudo code)

Code:

#!/bin/bash



while true; do

$var1 = `ping  your server`

if var1 eq "time out" then

 remove previous ip (using ifconfig command)

 add new ip (using ifconfig command)

exit

endif

done;

one thing i want to make clear here is that in shell code if you want the output of command to be saved in a variable then you use ` operator which is present just before 1 on keyboard.

$variable=`command`

You could also short it a little as :

Code:

if ! ping -c 1 <host IP>; then

  # host is down