ping.sh

#!/usr/bin/env sh

MAXRETRY=50
count=0
ping -W3 -c1 www.google.com > /dev/null 2>&1
while [ $? -ne 0 ]; do
   #statements
   if [ "$count" = "$MAXRETRY" ]; then
     echo "No network found outside to Internet"
     exit 1
   fi
   echo "Retry the network times: $count"
   count=$((count + 1))
   sleep 1
   ping -W3 -c1 www.google.com > /dev/null 2>&1
done