参考链接：
https://cloud.tencent.com/developer/article/1711887
https://www.psay.cn/toss/182.html

文件位置：

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/etc/netplan

文件:

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00-installer-config.yaml

里面的内容：

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# This is the network config written by 'subiquity'
network:
  ethernets:
    enp1s0:
      dhcp4: no
      addresses: [192.168.1.204/24]
      optional: true
      nameservers:
        addresses: [192.168.1.1,114.114.114.114]
  version: 2

生效：

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sudo netplan apply

修改后

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# This is the network config written by 'subiquity'
network:
  ethernets:
    enp1s0:
      dhcp4: no
      addresses: [192.168.1.204/24]
      optional: true
      nameservers:
        addresses: [192.168.1.1]
  version: 2

修改前

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# This is the network config written by 'subiquity'
network:
  ethernets:
    enp1s0:
      dhcp4: true
  version: 2