【bug】[Errno 14] curl#6 - “Could not resolve host: mirrors.163.com； Unknown error“

错误重现:

[root@aimaster ~]# yum -y install samba
执行命令报错， 结果如下：

总下载量：7.7 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
dbus-1.10.24-15.el7.x86_64.rpm FAILED                                          
http://mirrors.163.com/centos/7/os/x86_64/Packages/dbus-1.10.24-15.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: mirrors.163.com; Unknown error"
正在尝试其它镜像。
dbus-libs-1.10.24-15.el7.x86_6 FAILED                                          
http://mirrors.163.com/centos/7/os/x86_64/Packages/dbus-libs-1.10.24-15.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: mirrors.163.com; Unknown error"
正在尝试其它镜像。

解决办法:

[root@master ~]# vi /etc/resolv.conf 
# Generated by NetworkManager
nameserver 8.8.8.8
#向resolv.conf文件中添加下面内容
nameserver 114.114.114.114