手工修改 /etc/resolv.conf

1. 修改 /etc/NetworkManager/NetworkManager.conf 文件

在main部分添加 “dns=none” 选项：

[main]
plugins=ifcfg-rh

dns=none

2. NetworkManager重新装载上面修改的配置

systemctl restart NetworkManager.service

3. 手工修改 /etc/resolv.conf

nameserver 114.114.114.114

nameserver 8.8.8.8