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
