send status info to target server.

ping.sh

#!/bin/bash
server_ip=`route | grep default | awk '{print $2}'`
client_name=`cat /etc/hostname`
mac_address=`ifconfig -a | grep eth0 | awk '{print $5}'`
# echo $server_ip
#if [ -n $1 ]; then
#    echo "Argument error, usage: ./ping.sh your_ip"
#    exit 1
#fi
for (( ; ; ))
do
   echo "ping server ..."
   curl --connect-timeout 5  "http://$server_ip:4567/ping?client_name=$client_name&mac=$mac_address"
   sleep 20
done