linux安装软件时提示找不到镜像的问题：Couldn't resolve host 'mirrorlist.centos.org'

 

问题：
[root@cddserver2 ~]# yum installgroup "KDE"
Loaded plugins: fastestmirror, presto
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was
14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

ifconfig 网卡获取ip

原因：

 dns服务器没有配置正确

网卡未配置

解决办法：
1、打开文件/etc/resolv.conf在其中添加：
 nameserver 8.8.8.8
 nameserver 8.8.4.4
 search localdomain

2、

vi /etc/sysconfig/network-scripts/ifcfg-eth0

将配置改成如下：

重启网卡：

service network restart

ping www.baidu.com...

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