centos7怎么修改dns

[root@localhost ~]# vim /etc/NetworkManager/NetworkManager.conf

[main]

#plugins=ifcfg-rh,ibft

dns=none

[root@localhost ~]# systemctl restart NetworkManager.service

[root@localhost ~]# vim /etc/resolv.conf

# Generated by NetworkManager

nameserver 114.114.114.114

nameserver 8.8.8.8