# 取消通过 NetworkManager 管理 /etc/resolv.conf 文件
# vim /etc/NetworkManager/conf.d/90-dns-none.conf
[main]
dns=none
# 重载配置生效
systemctl reload NetworkManager
# 直接修改 /etc/resolv.conf 即可
vim /etc/resolv.conf
# 验证
# vim /etc/resolv.conf 修改后
# systemctl reload NetworkManager
# 查看 /etc/resolv.conf 是不是没有变化
# 查看 NetworkManager 现有配置
NetworkManager --print-config