我制作了这个简单的 bash 脚本来运行 ping 扫描并抓取我网络上活动的 MAC 地址，输出到一个文件，然后将该文件与一个文件进行比较，该文件包含我从我的 ARP 表中抓取的已知 MAC 地址列表。路由器。
与其为迭代的每一行回显结果，不如让 for 循环吐出一个输出，例如“您的网络上的所有设备都熟悉”？
当前代码：
sudo nmap -sn 192.168.0.0/24 | grep "MAC" | awk '{print $3}'| sort > $HOME/Desktop/arp.txt
readarray -t mac <$HOME/Desktop/arptable.txt
for address in "${mac[@]}"; do
if grep -Fxq "$address" $HOME/Desktop/arptable.txt;
then
echo "$address is a known network device"
else
echo "WARNING: $address is an unknown device on the network"
fi
done
我当前的输出看起来像：
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
XXXXXXXXXXXXXXXXX is a known network device
免责声明：这只是一个项目，并没有用作严肃的安全工具。
假设您仍然想打印WARNING消息......跟踪成功次数，如果等于数组中的条目数，mac[]则打印您想要的消息，例如：
found=0
for address in "${mac[@]}"; do
if grep -Fxq "$address" $HOME/Desktop/arptable.txt;
then
((found++))
else
echo "WARNING: $address is an unknown device on the network"
fi
done
[[ "${found}" -eq "${#max[@]}" ]] && echo "All Devices are familiar on your network"
或者，如果您生成任何WARNING消息，请清除标志：
foundall=true
for address in "${mac[@]}"; do
if ! grep -Fxq "$address" $HOME/Desktop/arptable.txt;
then
echo "WARNING: $address is an unknown device on the network"
foundall=false
fi
done
[[ "${foundall}" == 'true' ]] && echo "All Devices are familiar on your network"
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