教你优化yum源。配置阿里云的yum镜像源（base和epel）

一、Centos7的base源配置阿里云的yum源：

1、备份旧的yum源目录下的所有文件

[root@ELK-chaofeng07 yum.repos.d]# mkdir ../yum.repos.d.bak ; mv ./* ../yum.repos.d.bak

2、下载base文件

#各系统版本repo文件对应的下载操作
CentOS
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
CentOS
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、清空缓存

yum clean all

4、构建新的缓存

yum makecache

5、查看基本yum源

[root@ELK-chaofeng07 yum.repos.d]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * epel: mirrors.tuna.tsinghua.edu.cn
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
repo id                                                            repo name                                                                                         status
base//x86_64                                                      CentOS- - Base - mirrors.aliyun.com                                                              ,
*epel/x86_64                                                       Extra Packages for Enterprise Linux  - x86_64                                                    ,
extras//x86_64                                                    CentOS- - Extras - mirrors.aliyun.com
updates//x86_64                                                   CentOS- - Updates - mirrors.aliyun.com                                                            ,
repolist: ,

二、配置阿里云的epel源

1、下载阿里云的epel源。我们到官网：http://mirrors.aliyun.com

2、开始备份旧的epel-release源

mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup
mv /etc/yum.repos.d/epel-testing.repo /etc/yum.repos.d/epel-testing.repo.backup

3、下载新的阿里云的epel源

epel(RHEL )

    wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
epel(RHEL )

    wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
epel(RHEL )

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

4、清空缓存

[root@ELK-chaofeng07 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up everything
Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos
Cleaning up list of fastest mirrors

4、构建新的缓存

[root@ELK-chaofeng07 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
base                                                            | 3.6 kB  ::
epel                                                            | 4.7 kB  ::
extras                                                          | 3.4 kB  ::
updates                                                         | 3.4 kB  ::
(/): base//x86_64/group_gz                                  |  kB  ::
(/): base//x86_64/primary_db                                | 6.0 MB  ::
(/): base//x86_64/filelists_db                              | 7.1 MB  ::
(/): epel/x86_64/group_gz                                    |   kB  ::
(/): base//x86_64/other_db                                  | 2.6 MB  ::
(/): epel/x86_64/updateinfo                                  |  kB  ::
(/): epel/x86_64/prestodelta                                 |   kB  ::
(/): epel/x86_64/primary_db                                  | 6.6 MB  ::
(/): epel/x86_64/filelists_db                                |   MB  ::
(/): extras//x86_64/prestodelta                            |   kB  ::
(/): extras//x86_64/filelists_db                           |  kB  ::
(/): epel/x86_64/other_db                                   | 3.2 MB  ::
(/): extras//x86_64/primary_db                             |  kB  ::
(/): extras//x86_64/other_db                               |  kB  ::
(/): updates//x86_64/prestodelta                           |  kB  ::
(/): updates//x86_64/filelists_db                          | 2.2 MB  ::
(/): updates//x86_64/other_db                              |  kB  ::
(/): updates//x86_64/primary_db                            | 2.5 MB  ::
Determining fastest mirrors
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
Metadata Cache Created

5、查看yum源

[root@ELK-chaofeng07 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
base                                                            | 3.6 kB  ::
epel                                                            | 4.7 kB  ::
extras                                                          | 3.4 kB  ::
updates                                                         | 3.4 kB  ::
(/): base//x86_64/group_gz                                  |  kB  ::
(/): base//x86_64/primary_db                                | 6.0 MB  ::
(/): base//x86_64/filelists_db                              | 7.1 MB  ::
(/): epel/x86_64/group_gz                                    |   kB  ::
(/): base//x86_64/other_db                                  | 2.6 MB  ::
(/): epel/x86_64/updateinfo                                  |  kB  ::
(/): epel/x86_64/prestodelta                                 |   kB  ::
(/): epel/x86_64/primary_db                                  | 6.6 MB  ::
(/): epel/x86_64/filelists_db                                |   MB  ::
(/): extras//x86_64/prestodelta                            |   kB  ::
(/): extras//x86_64/filelists_db                           |  kB  ::
(/): epel/x86_64/other_db                                   | 3.2 MB  ::
(/): extras//x86_64/primary_db                             |  kB  ::
(/): extras//x86_64/other_db                               |  kB  ::
(/): updates//x86_64/prestodelta                           |  kB  ::
(/): updates//x86_64/filelists_db                          | 2.2 MB  ::
(/): updates//x86_64/other_db                              |  kB  ::
(/): updates//x86_64/primary_db                            | 2.5 MB  ::
Determining fastest mirrors
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
Metadata Cache Created

此时再次下载东西你会发现非常快。不懂请点击