cenos7配置epel源

1.首先进入/etc/yum.repos.d/目录下，新建一个repo_bak目录，用于保存系统中原来的repo文件

[root@bogon ~]# cd /etc/yum.repos.d/

[root@bogon yum.repos.d]# mkdir repo_bak

[root@bogon yum.repos.d]# mv *.repo repo_bak/

2.在CentOS中配置使用网易和阿里的开源镜像

[root@bogon yum.repos.d]# wget http://mirrors.aliyun.com/repo/Centos-7.repo

[root@bogon yum.repos.d]# wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

[root@bogon yum.repos.d]# ls
Centos-7.repo  CentOS-Base-163.repo  repo.bak

或者手动下载repo文件并上传到/etc/yum.repos.d/目录

网易开源镜像站

阿里开源镜像站

3.清除系统yum缓存并生成新的yum缓存

[root@bogon yum.repos.d]# ls        # 列出/etc/yum.repos.d/目录下的文件
Centos-7.repo  CentOS-Base-163.repo  repo.bak

[root@bogon yum.repos.d]# yum clean all        # 清除系统所有的yum缓存
Loaded plugins: fastestmirror, langpacks
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Cleaning repos: base extras updates
Cleaning up everything
Cleaning up list of fastest mirrors

[root@bogon yum.repos.d]# yum makecache        # 生成yum缓存
Loaded plugins: fastestmirror, langpacks
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
base                                                                                  | 3.6 kB  00:00:00
extras                                                                                | 3.4 kB  00:00:00
updates                                                                               | 3.4 kB  00:00:00
(1/12): base/7/x86_64/filelists_db                                                    | 6.7 MB  00:00:02
(2/12): base/7/x86_64/group_gz                                                        | 156 kB  00:00:02
(3/12): base/7/x86_64/other_db                                                        | 2.5 MB  00:00:01
(4/12): base/7/x86_64/primary_db                                                      | 5.7 MB  00:00:02
(5/12): extras/7/x86_64/prestodelta                                                   |  51 kB  00:00:01
(6/12): extras/7/x86_64/filelists_db                                                  | 494 kB  00:00:02
(7/12): extras/7/x86_64/other_db                                                      |  86 kB  00:00:00
(8/12): extras/7/x86_64/primary_db                                                    | 130 kB  00:00:01
(9/12): updates/7/x86_64/prestodelta                                                  | 406 kB  00:00:01
(10/12): updates/7/x86_64/filelists_db                                                | 2.1 MB  00:00:01
(11/12): updates/7/x86_64/other_db                                                    | 354 kB  00:00:00
(12/12): updates/7/x86_64/primary_db                                                  | 3.6 MB  00:00:01
Determining fastest mirrors
Metadata Cache Created

4.安装epel源

[root@bogon yum.repos.d]# yum list | grep epel-release
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
epel-release.noarch                         7-9                        extras   

[root@bogon yum.repos.d]# yum install -y epel-release
Loaded plugins: fastestmirror, langpacks
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-9 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================
 Package                       Arch                    Version                 Repository               Size
=============================================================================================================
Installing:
 epel-release                  noarch                  7-9                     extras                   14 k

Transaction Summary
=============================================================================================================
Install  1 Package