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

sed -i '/mirrorlist/d' CentOS-Base.repo

sed -i 's/\$releasever/6/' CentOS-Base.repo

sed -i '/\ [addons\]/,/^$/d' CentOS-Base.repo