使用yum命令安装的时候出错：yum localinstall --nogpgcheck *.rpm

错误如下：

Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=i386&repo=os error was
14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"
@H_502_22@Error: Cannot find a valid baseurl for repo: base

解决方法如下（修改dns配置）

vi /etc/resolv.conf

在此文件最后加入：nameserver xxx.xxx.xxx.xxx

如果没有vi编辑器可用：

echo "nameserver xxx.xxx.xxx.xxx" >>/etc/resolv.conf

然后pingwww.baidu.com

可以ping通，不会再出现unknow host

ok，安装依赖，

最后出现compelete即可