网段IP占用检测

#!/bin/bash
src_ip="192.168.64"
for i in {3..254}
do
    {
        ping -c1 $src_ip.$i &>/dev/null
        if [ $? -eq 0 ];then
                echo "已经占用: $src_ip.$i" >> ip_up.txt
                echo "已经占用: $src_ip.$i"
        else
                echo "未被使用: $src_ip.$i" >> ip_down.txt
                echo "未被使用: $src_ip.$i"
        fi
} &
done
wait
echo "finish..."