脚本比较简单，可以判断服务器是否开机。

#!/bin/bash
#Checks to see if hosts 192.168.1.1-192.168.1.255 are alive
for n in {1..200}; do
         host=192.168.1.$n
         ping -c2 $host &>/dev/null
         if [ $? = 0 ]; then
                      echo "$host is UP"
         else
                      echo "$host is DOWN"
         fi
done