Could not retrieve mirrorlist

 [root@localhost ~]# yum install yum-fastestmirror -y

Could not retrieve mirrorlist  [url]http://mirrorlist.centos.org/?release=5&arch=i386&repo=os[/url] error was
[Errno 4] IOError:
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

或

[root@localhost ~]# yum -y install wget   （注：在下载wget命令并安装)

Could not retrieve mirrorlist  [url]http://mirrorlist.centos.org/?release=5&arch=i386&repo=os[/url] error was
[Errno 4] IOError:
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

 

不管是用上面还是用下面那命令都会出现那错误

原因：没有配置resolv.conf，导致DNS解析错误！

解决方法:

到/etc目录下配置resolv.conf:

vi /etc/resolv.conf

添加：

nameserver DNS_IP

保存再次运行上面命令就可以。