首先编辑文件resolved.conf
vim /etc/systemd/resolved.conf修改DNS=8.8.8.8, DNSStubListener=no，或直接粘贴以下内容
[Resolve]
DNS=8.8.8.8
#FallbackDNS=
#Domains=
#LLMNR=no
#MulticastDNS=no
#DNSSEC=no
#DNSOverTLS=no
#Cache=no
DNSStubListener=no
#ReadEtcHosts=yes更新文件软链接
ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf重启
reboot