ping主机脚本

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#!/bin/bash #ping   net='172.16.1' uphosts=0 downhosts=0   for i in {1..254};do   ping -c 1 -w 1 ${net}.${i} &> /dev/null   if [ $? -eq 0 ];then     echo "${net}.${i} is up."     let uphosts++   else     echo "${net}.${i} is down."     let downhosts++   fi done   echo "Up hosts:$uphosts" echo "Down hosts:$downhosts" ~