ubuntu18.04修改dns

sudo vim /etc/systemd/resolved.conf

[Resolve]
DNS=114.114.114.114
DNS=8.8.8.8
#FallbackDNS=
#Domains=
#LLMNR=no
#MulticastDNS=no
#DNSSEC=no
#Cache=yes
#DNSStubListener=yes

systemctl restart systemd-resolved.service

$ systemd-resolve --status
Global
         DNS Servers: 114.114.114.114
                      8.8.8.8
          DNSSEC NTA: 10.in-addr.arpa
                      16.172.in-addr.arpa
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa
                      18.172.in-addr.arpa
                      19.172.in-addr.arpa