Red Hat

Hi,
I want to run a script for continuous ping for a day then delete the previous day after checking if there is a gap in between with the other servers connectivity. Output the result in a /tmp file everyday. Mainly i am trying to troubleshoot cacti graph gap i am seeing in certain time in a particular server. Not sure why it is doing that.so i want to keep pinging the cacti server. Is there a better way of monitoring this ?

The command ping usually accepts a flag for a count, typically -c or -n so you could choose to either rin it with a count of 1 and append to the log files then scan through them later, or you could schedule the ping and set the count for 60 seconds * 60 minutes * 24 hours (86400) then read the output for packets dropped.


I hope that this helps
Robin
Liverpool/Blackburn
UK

Thanks for the response!
Can you please provide the actual syntax.

Something like:-

Code:

ping -c 1 10.20.30.40

...will get you a one second ping to reconcile, or

Code:

ping -c 86400 10.20.30.40

... will give you 24Hrs. of output.

If you ran the latter with a cron entry thus:-

Code:

0 0 * * * ping -c 86400 10.20.30.40 > /tmp/`date +%Y_%m_%d`

The, at a later date you could:-

Code:

grep "packets transmitted" /tmp/output_file read in p t out rest

if [ $in -ne $out ]
then
   echo "We have a problem"
else
   echo "All okay"
fi

Does that help at all?



Robin
Liverpool/Blackburn
UK

Thanks again.
I am running it for 60 sec. But facing a problem
# cat ping.sh
ping -c 60 serverip > /tmp/`date +%Y_%m_%d`
[root@test1 tmp]# cat ping_out.sh
grep "packets transmitted" /tmp/2012_04_20

if [ $in -ne $out ]
then
echo "We have a problem"
else
echo "All okay"
fi

But when i am running it its saying "We have a problem"
# ./ping_out.sh
60 packets transmitted, 60 received, 0% packet loss, time 59034ms
We have a problem


Can you please explain whats
[ $in -ne $out ] doing ?

Oh, a typo from me there. I missed the pipe into the read statement. Corrected code below:-

Code:

grep "packets transmitted" /tmp/output_file | read in p t out rest

if [ $in -ne $out ]
then
   echo "We have a problem"
else
   echo "All okay"
fi

Is that a little better?




Robin

Thanks. But why is it saying "We have a problem" , as there were no gaps or errors shouldnt it say "All okay". Also i didnt catch the logic of
[ $in -ne $out ]