#!/bin/bash
for i in  `seq 2 254`
 do 
  ping  -w 1 $1.$i > /dev/null 2>&1
    if [ $? -eq 0 ]
     then
       echo "The server(${i}) status is UP"
       echo $1.$i >> ip.txt
     else
       echo "The server(${i}) status is DOWN"
    fi
 done

执行：
./xx.sh 192.168.10

-w 1指定超时时间为1秒