配置源

1.备份

[root@centos1 xdebug-2.2.4]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

2.下载对应版本repo文件, 放入/etc/yum.repos.d/

[root@centos1 XX]# mv /etc/CentOS6-Base-163.repo /etc/yum.repos.d/
[root@centos1 XX]# cd /etc/yum.repos.d/
[root@centos1 yum.repos.d]# ls
CentOS6-Base-163.repo  CentOS-Debuginfo.repo  CentOS-Vault.repo
CentOS-Base.repo.bak   CentOS-Media.repo

3.运行yum makecache生成缓存

[root@centos1 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
base                                                           | 3.7 kB     00:00    
base/filelists_db                                              | 5.1 MB     00:02    
base/other_db                                                  | 2.2 MB     00:01    
extras                                                         | 3.4 kB     00:00    
extras/filelists_db                                            |  31 kB     00:00    
extras/prestodelta                                             |  332 B     00:00    
extras/other_db                                                |  36 kB     00:00    
updates                                                        | 3.4 kB     00:00    
updates/filelists_db                                           | 805 kB     00:01    
updates/prestodelta                                            |  91 kB     00:00    
updates/other_db                                               | 6.9 MB     00:15    
Metadata Cache Created

配置源

原文：http://www.cnblogs.com/stay-sober/p/4162148.html