Ubuntu18.04 修改DNS
sudo vim /etc/systemd/resolved.conf修改如下：
[Resolve]
DNS=119.29.29.29保存退出后
systemctl restart systemd-resolved.service
sudo vim /etc/systemd/resolved.conf修改如下：
[Resolve]
DNS=119.29.29.29保存退出后
systemctl restart systemd-resolved.service原文：https://www.cnblogs.com/sandea/p/9784634.html