我完成了 CentOS 6 的安装，但是当我尝试运行时，yum update我得到：
[root@centos6test ~]# yum update
Loaded plugins: fastestmirror, refresh-packagekit
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=i386&repo=os
error was 14: PYCURL ERROR 6 - "" Error: Cannot find a valid baseurl for repo: base
为什么会这样？我该如何解决？
centos ×1