到网易和阿里开源镜像站点下载系统对应版本的repo文件
[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]# lsCentos-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, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationCleaning repos: base extras updatesCleaning up everythingCleaning up list of fastest mirrors[root@bogon yum.repos.d]# yum makecache# 生成yum缓存Loaded plugins: fastestmirror, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationbase | 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 mirrorsMetadata Cache Created4.安装epel源[root@bogon yum.repos.d]# yum list | grep epel-releaseRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationepel-release.noarch 7-9 extras [root@bogon yum.repos.d]# yum install -y epel-releaseLoaded plugins: fastestmirror, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationLoading mirror speeds from cached hostfileResolving Dependencies--> Running transaction check---> Package epel-release.noarch 0:7-9 will be installed--> Finished Dependency ResolutionDependencies Resolved============================================================================================================= Package Arch Version Repository Size=============================================================================================================Installing: epel-release noarch 7-9 extras 14 kTransaction Summary=============================================================================================================Install 1 PackageTotal download size: 14 kInstalled size: 24 kDownloading packages:epel-release-7-9.noarch.rpm | 14 kB 00:00:00 Running transaction checkRunning transaction testTransaction test succeededRunning transaction Installing : epel-release-7-9.noarch 1/1 Verifying : epel-release-7-9.noarch 1/1 Installed: epel-release.noarch 0:7-9 Complete![root@bogon yum.repos.d]# ls# epel源安装成功，比原来多了一个epel.repo和epel-testing.repo文件Centos-7.repo CentOS-Base-163.repo epel.repo epel-testing.repo repo.bak5.使用阿里开源镜像提供的epel源[root@bogon yum.repos.d]# wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo # 下载阿里开源镜像的epel源文件--2018-03-08 20:22:14-- http://mirrors.aliyun.com/repo/epel-7.repoResolving mirrors.aliyun.com (mirrors.aliyun.com)... 183.2.199.237, 113.96.109.95, 113.96.109.93, ...Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|183.2.199.237|:80... connected.HTTP request sent, awaiting response... 200 OKLength: 1084 (1.1K) [application/octet-stream]Saving to: ‘/etc/yum.repos.d/epel-7.repo’100%[=================================================================================================>] 1,084 --.-K/s in 0s 2018-03-08 20:22:14 (130 MB/s) - ‘/etc/yum.repos.d/epel-7.repo’ saved [1084/1084][root@bogon yum.repos.d]# lsCentOS7-Base-163.repo Centos-7.repo epel-7.repo epel.repo epel-testing.repo repo_bak6.再次清除系统yum缓存，并重新生成新的yum缓存[root@bogon yum.repos.d]# yum clean allLoaded plugins: fastestmirror, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationRepository epel is listed more than once in the configurationRepository epel-debuginfo is listed more than once in the configurationRepository epel-source is listed more than once in the configurationCleaning repos: base epel extras updatesCleaning up everythingCleaning up list of fastest mirrors[root@bogon yum.repos.d]# yum makecacheLoaded plugins: fastestmirror, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationRepository epel is listed more than once in the configurationRepository epel-debuginfo is listed more than once in the configurationRepository epel-source is listed more than once in the configurationbase | 3.6 kB 00:00:00 epel | 4.7 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/18): base/7/x86_64/group_gz | 156 kB 00:00:01 (2/18): base/7/x86_64/filelists_db | 6.7 MB 00:00:07 (3/18): base/7/x86_64/primary_db | 5.7 MB 00:00:06 (4/18): epel/x86_64/group_gz | 266 kB 00:00:01 (5/18): epel/x86_64/updateinfo | 899 kB 00:00:02 (6/18): epel/x86_64/prestodelta | 7.1 kB 00:00:00 (7/18): base/7/x86_64/other_db | 2.5 MB 00:00:05 (8/18): epel/x86_64/primary_db | 6.3 MB 00:00:04 (9/18): extras/7/x86_64/filelists_db | 636 kB 00:00:00 (10/18): extras/7/x86_64/primary_db | 166 kB 00:00:00 (11/18): extras/7/x86_64/other_db | 108 kB 00:00:00 (12/18): extras/7/x86_64/prestodelta | 102 kB 00:00:01 (13/18): epel/x86_64/other_db | 3.0 MB 00:00:01 (14/18): epel/x86_64/filelists_db | 10 MB 00:00:09 (15/18): updates/7/x86_64/filelists_db | 3.5 MB 00:00:02 (16/18): updates/7/x86_64/prestodelta | 771 kB 00:00:02 (17/18): updates/7/x86_64/other_db | 621 kB 00:00:00 (18/18): updates/7/x86_64/primary_db | 6.0 MB 00:00:03 Determining fastest mirrors * epel: mirrors.aliyun.comMetadata Cache Created7.查看系统可用的yum源和所有的yum源[root@bogon yum.repos.d]# yum repolist enabledLoaded plugins: fastestmirror, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationRepository epel is listed more than once in the configurationRepository epel-debuginfo is listed more than once in the configurationRepository epel-source is listed more than once in the configurationLoading mirror speeds from cached hostfile * epel: mirrors.aliyun.comrepo id repo name statusbase/7/x86_64 CentOS-7 - Base - 163.com 9,591epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 12,382extras/7/x86_64 CentOS-7 - Extras - 163.com 390updates/7/x86_64 CentOS-7 - Updates - 163.com 1,941repolist: 24,304[root@bogon yum.repos.d]# yum repolist allLoaded plugins: fastestmirror, langpacksRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationRepository epel is listed more than once in the configurationRepository epel-debuginfo is listed more than once in the configurationRepository epel-source is listed more than once in the configurationLoading mirror speeds from cached hostfile * epel: mirrors.aliyun.comrepo id repo name statusbase/7/x86_64 CentOS-7 - Base - 163.com enabled: 9,591centosplus/7/x86_64 CentOS-7 - Plus - 163.com disabledcontrib/7/x86_64 CentOS-7 - Contrib - mirrors.aliyun.com disabledepel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 enabled: 12,382epel-debuginfo/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 - Debug disabledepel-source Extra Packages for Enterprise Linux 7 - x86_64 - Source disabledepel-testing/x86_64 Extra Packages for Enterprise Linux 7 - Testing - x86_64 disabledepel-testing-debuginfo/x86_64 Extra Packages for Enterprise Linux 7 - Testing - x86_64 - Debug disabledepel-testing-source/x86_64 Extra Packages for Enterprise Linux 7 - Testing - x86_64 - Source disabledextras/7/x86_64 CentOS-7 - Extras - 163.com enabled: 390updates/7/x86_64 CentOS-7 - Updates - 163.com enabled: 1,941repolist: 24,304