關於「Ifconfig show DNS」標籤，搜尋引擎有相關的訊息討論：

How to view the DNS address assigned by DHCP? - Ask Ubuntuaskubuntu.com › questions › how-to-view-the-dns-address...What DNS servers am I using? - Unix & Linux Stack Exchangeunix.stackexchange.com › questions › what-dns-servers-a...Ubuntu 18.04 Server - how to check DNS IP