檢測某一段ip是否被贊用

#!/bin/bash

ip=192.168.10.

for i in `seq 1 20`

do

        ping -c 2 $ip$i > /dev/null 2>&1 | grep -q 'ttl=' && echo "$ip$i is yes " || echo "$ip$i is no "

done

或者

#!/bin/sh

for n in `seq 245`                     

do 

ping -c2 192.168.26.$n >/dev/null 2>&1  

  if [ $? -eq 0 ]                      

    then

      echo "192.168.26.$n is up" >>/data/uplist.log  

    else

      echo "192.168.26.$n is down" >>/data/downlist.log