I need a basic ping script

[AidanEnos]

What I want is to have a ping script repeat every X seconds, ping from a list and put devices that don't respond in a text file. Here's my thinking... can you tell me where I went wrong. I know how to make it all a single executable file and chmod to 777 to make it run... it's the programming I am not so good at ;o)

ping "list.txt" -s (datagram size) 10 -I (ping interval) 60|grep "did not respond" > exceptions.txt

list.txt will be (any file with a list of devices):

10.10.10.1
10.10.10.2
10.10.10.3
10.10.10.4
10.10.10.5

And I want it to look for failed ping responses and log them in a file called exceptions.txt

What I have put above is kinda my best guess, please help me make this a little more... user friendly )

Thanks all!

AidanEnos

 

[KenCunningham]

Quick and dirty, but this should point you in the right direction:

for p in `cat pinglist`
do
ping $p 1> /dev/null
if [ $? -ne 0 ]
then
echo $p >> badpings
fi
done

Where pinglist is your list of IP addresses and badpings are the failures. You'll need to run this at a specified interval from cron.

Hope this helps.

 

[AidanEnos]

2 questions...

should the 2nd last line be if instead of fi?

Is there a way to have it timestamp the failed pings in the badpings file? Something like insert date on append or something?

Thanks again!!

AidanEnos

 

[KenCunningham]

As far as the fi is concerned, it's fine. It's just shell scripting for 'end if' as used in other languages. As to the timing issue, the following should do it:

for p in `cat pinglist`
do
ping $p 1> /dev/null
if [ $? -ne 0 ]
then
echo $p" on `date`" >> badpings
fi
done

Note that the `date` is enclosed within `'s, found on the key above the tab on the left hand side of the keyboard (at least on mine). They mean 'let the shell interpret this'.

Hope this helps. Cheers.