Need a Simple ping script

Shell Programming and Scripting
1

Hi,

I am a learner in shell scripting. Can someone help me in getting a script to run the ping command in the background through a script to get the status of my servers and email me if ping failed with list of servers in one email.

Thanks

2

do you have something in your mind?

man ping

ping switches varies with OS. what flavor you have?

try something;

while read HOST
do
 ping $HOST
 if [ "$?" -ne "0" ]; then
  echo $HOST >> failed_host.$$
 fi
done < hostfile
if [ -s "failed_host.$$"];then
 cat failed_host.$$ | mailx -s failed server list somename@domain.com
fi

note: this is just an idea. not tested.

3

Thanks for the response.

I have couple of hosts in the same network running on Solaris and Linux. Ping command varies from solaris and linux. We need a script to grep for uname first,then if it returns solaris i am using " `ping -s $myHost $SIZE $COUNT | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }'`" . If uname returns linux then " (ping -c $COUNT $myHost | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')". My question is if i run the ping for single host it takes min 10secs for the 4 packets to transmit. I need help in writing the script which executes the ping at background on all hosts and write to a file. Then parse the for "recieved -eq 0" then shoot an email with the ping failed hosts.

myHost = /home/user/listofhosts -- file stored with list of hosts(linux&solaris)

4 
ping -c 3 $SERVER

so it will stop after 3 pings

5

This simple script should do the trick:

#!/bin/ksh
HOSTLIST=~/hostlist
rm /tmp/pingfail.* 2>/dev/null
for host in $(cat $HOSTLIST); do
  ( ping -c 4 $host >/dev/null 2>&1 || touch /tmp/pingfail.$host)&
done;
wait
if ls /tmp/pingfail.*>/dev/null 2>&1; then
  for failhost in /tmp/pingfail.*; do
    echo ${failhost#*.}
  done | mailx -s "failed server list" somename@domain.com 2>/dev/null
  rm /tmp/pingfail.* 2>/dev/null
fi

Instead of ksh you can use bash too, just replace #!/bin/ksh with #!/bin/bash

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