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https://blog.toright.com/posts/6293/ubuntu-18-04-%e9%80%8f%e9%81%8e-netplan-%e8%a8%ad%e5%ae%9a%e7%b6%b2%e8%b7%af%e5%8d%a1-ip.html
Ubuntu 18.04 透過 netplan 設定網路卡 IP