ping ip地址

#!/bin/bash
# author:shujiangle

cmd=$(cat ip.txt)
for i in $cmd
do
    num=$(ping -c 5 $i | grep ttl | wc -l)
    if [ $num == 5 ]
       then
           echo -e "$(ping -c 5 $i)"
           echo -e "$i is yes" >> ping_ip.txt
       else
           echo -e "$(ping -c 5 $i)"
           echo -e "$i is no" >> ping_ip.txt
    fi
done