This directory CentOS 6.7使用阿里云CentOS的yum源 1、备份原有repo文件 #cd /etc/yum.repos.d #mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup ## ll total 16 -rw-r--r--. 1 root root 2572 Jul 2 2014 CentOS-Base.repo -rw-r--r--. 1 root root 529 Jun 12 2015 CentOS-Base.repo.backup -rw-r--r--. 1 root root 358 Oct 24 23:23 redhat.repo -rw-r--r--. 1 root root 3749 Mar 29 2017 repomd.xml 2.下载repo文件 # wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo --2017-10-31 19:14:33-- http://mirrors.aliyun.com/repo/Centos-6.repo Resolving mirrors.aliyun.com... 223.111.244.145,223.111.244.152,223.111.244.147,... Connecting to mirrors.aliyun.com|223.111.244.145|:80... connected. HTTP request sent,awaiting response... 200 OK Length: 2572 (2.5K) [application/octet-stream] Saving to: “/etc/yum.repos.d/CentOS-Base.repo” 100%[=============================================================================================================================>] 2,572 --.-K/s in 0s 2017-10-31 19:14:33 (204 MB/s) - “/etc/yum.repos.d/CentOS-Base.repo” saved [2572/2572] 3.但在yum makecahe 时候报错 # yum makecache Loaded plugins: aliases,changelog,kabi,presto,product-id,refresh-packagekit,security,subscription-manager,tmprepo,verify,versionlock This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Loading support for Red Hat kernel ABI http://mirrors.aliyun.com/centos/6Server/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found" Trying other mirror. http://mirrors.aliyuncs.com/centos/6Server/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.aliyuncs.com/centos/6Server/os/x86_64/repodata/repomd.xml: (28,'connect() timed out!') Trying other mirror. Error: Cannot retrieve repository Metadata (repomd.xml) for repository: base. Please verify its path and try again 4.查看repo文件 ## vi CentOS-Base.repo # CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS updates # unless you are manually picking other mirrors. # # If the mirrorlist= does not work for you,as a fall back you can try the # remarked out baseurl= line instead. [base] name=CentOS-$releasever - Base - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6 #released updates [updates] name=CentOS-$releasever - Updates - mirrors.aliyun.com # CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS updates # unless you are manually picking other mirrors. # # If the mirrorlist= does not work for you,as a fall back you can try the # remarked out baseurl= line instead. [base] name=CentOS-$releasever - Base - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6 #released updates [updates] name=CentOS-$releasever - Updates - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/# cd /etc/yum.repos.d/ 5.查看6.7的readmew文件,还是有些表变化发现小版本不再进行更新 This directory (and version of CentOS) is deprecated. For normal users,you should use /6/ and not /6.7/ in your path. Please see this FAQ concerning the CentOS release scheme: If you know what you are doing,and absolutely want to remain at the 6.7 level,go to http://vault.centos.org/ for packages. Please keep in mind that 6.0,6.1,6.2,6.3,6.4,6.5,6.6 and 6.7 no longer gets any updates,norany security fix's.. 根据repo文件变量的变化，可以修改repo文件把所有$releasever替换成6 执行替换操作 #sed -i 's/\$releasever/6/' CentOS-Base.repo 6.清理并重新生成yum缓存 # yum clean all Loaded plugins: aliases,versionlock This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Loading support for Red Hat kernel ABI Cleaning repos: base extras updates Cleaning up Everything 0 delta-package files removed,by presto 7.重新yum makecache # yum makecache Loaded plugins: aliases,versionlock This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Loading support for Red Hat kernel ABI base | 3.7 kB 00:00 base/group_gz | 226 kB 00:00 base/filelists_db | 6.4 MB 00:01 base/primary_db | 4.7 MB 00:00 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 | 3.0 MB 00:00 updates/prestodelta | 145 kB 00:00 updates/primary_db | 4.7 MB 00:01 updates/other_db | 66 MB 00:26 Metadata Cache Created网上还有一个据说完善的方法，不过没有进行测试，有兴趣的同学可以测试一下
在所有mirrorlist前面加上#，并所有$releasever替换成6
sed -i '/mirrorlist/d' CentOS-Base.repo
sed -i 's/\$releasever/6/' CentOS-Base.repo
sed -i '/\ [addons\]/,/^$/d' CentOS-Base.repo
sed-i 's/RPM-GPG-KEY-CentOS-5/RPM-GPG-KEY-CentOS-6/' CentOS-Base.repo 原文链接：https://www.f2er.com/centos/375378.html