centos6.4配置網絡yum源

參考於：
http://mirrors.aliyun.com/help/centos?spm=5176.bbsr150321.0.0.d6ykiD
1、備份原文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak

2、下載新的repo文件
CentOS 5

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo 

CentOS 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

網易源centos6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS6-Base-163.repo

[root@rac1 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS6-Base-163.repo
2017-10-14 23:18:31 http://mirrors.163.com/.help/CentOS6-Base-163.repo
正在解析主機 mirrors.163.com 123.58.190.209, 123.58.190.228, 123.58.190.234,
正在連接 mirrors.163.com|123.58.190.209|:80 已連接。
已發出 HTTP 請求，正在等待回應 200 OK
長度：2006 (2.0K) [application/octet-stream]
正在保存至: “/etc/yum.repos.d/CentOS-Base.repo”
100%[=========================================================>] 2,006 .-K/s in 0.001s
2017-10-14 23:18:31 (1.90 MB/s) - 已保存 “/etc/yum.repos.d/CentOS-Base.repo” [2006/2006])

3、如果報域名解析失敗：

[root@RAC01 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
2017-10-14 01:22:16 http://mirrors.aliyun.com/repo/Centos-6.repo
正在解析主機 mirrors.aliyun.com 失敗：域名解析暫時失敗。
wget: 無法解析主機地址 “mirrors.aliyun.com”

4、新增dns域名地址
新增下面一條內容：

[root@RAC01 yum.repos.d]# vi /etc/resolv.conf 

nameserver 8.8.8.8

5、生成緩存

[root@RAC01 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com




base | 3.7 kB 00:00 
base/group_gz | 226 kB 00:00 
base/filelists_db | 6.4 MB 00:02 
base/primary_db | 4.7 MB 00:01 
base/other_db | 2.8 MB 00:00 
extras | 3.4 kB 00:00 
extras/filelists_db | 25 kB 00:00 
extras/prestodelta | 1.3 kB 00:00 
extras/primary_db | 29 kB 00:00 
extras/other_db | 30 kB 00:00 
updates | 3.4 kB 00:00 
updates/filelists_db | 2.9 MB 00:00 
updates/prestodelta | 130 kB 00:00 
updates/primary_db | 4.7 MB 00:01 
updates/other_db | 66 MB 00:18 
Metadata Cache Created

6、ok。