ping.sh

#!bin/bash
#ping host  ip 
for hostip in {1..254};                
do
        ip="172.20.100.$hostip"
                ping -c 1 -W 2 $ip &> /dev/null 
        if [ "$?" == "0" ];then
                echo $ip is UP
                echo -e "ip:$ip up" | tee -a up.txt
        else
                echo $ip is DOWN
                echo -e "ip:$ip down" | tee -a down.txt
        fi
done
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原文地址：https://www.cnblogs.com/leo001/p/10270510.html