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Ubuntu Server 22.04 网络配置

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DNS 服务器​

查看 DNS 状态​

$ resolvectl status
Global
         Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
  resolv.conf mode: stub
Current DNS Server: 8.8.8.8
       DNS Servers: 8.8.8.8 114.114.114.114

Link 2 (eth0)
    Current Scopes: DNS
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 1.1.1.1
       DNS Servers: 114.114.114.114 1.1.1.1

Link 3 (eth1)
Current Scopes: none
     Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

临时修改​

/etc/resolv.conf
nameserver 8.8.8.8
nameserver 114.114.114.114

长期有效​

/etc/systemd/resolved.conf
[Resolve]
DNS=114.114.114.114 4.2.2.1

修改后需要重启服务：sudo systemctl restart systemd-resolved