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Old 07-19-2005, 08:06 AM   #1
Registered: Mar 2005
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Question 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?
Old 07-19-2005, 09:41 AM   #2
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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)


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)
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.

Old 07-19-2005, 09:52 AM   #3
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You could also short it a little as :

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


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