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