CentOS 7 yum源

  分享几个CentOS7的yum源，

  每个做技术的总会经历各种各样的小白时刻，各种各样的窘况，下面分享一下自己的心得：

    情况如下，本人一不小心安装了最小化的CentOS 7，（就是没有CRT的上传下载工具，也没有  Wget），又是远程管理，突然间想远程安装一些软件，各种抓狂，想更新一下yum源，居然没有好的方  法 ，下载了阿里和网易的yum源，打开后会面临一个比较尴尬的问题，没有分行，没办法用CRP复制粘  贴，所以本文就给大家一个可以用CRT输进去的yum。

 首先说明一下：CentOS 7新添加了一个模块（已加载插件：fastestmirror），这个模块可以自动识别  最近的yum源，不过还是不如写入的yum源速度快。

  步骤如下：

    1：备份自有的yum源 

        cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.BK

    2:清空/etc/yum.repos.d/CentOS-Base.repo，等待新的yum源输入。

        echo "" > /etc/yum.repos.d/CentOS-Base.repo

        (当然我这只是个人习惯，也可删除后重建，或者用vi编辑器删除该命令的意思是

          将一个空格追加到该文件中，并且覆盖之前文件)

    3：用vi编辑器打开该文件/etc/yum.repos.d/CentOS-Base.repo

        vi /etc/yum.repos.d/CentOS-Base.repo

    4：将下列文件粘贴进去（阿里yum）

# 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-7

#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-7

#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/

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/

        http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/

        http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

    5.":wq"退出后，使用yum makecache生成缓存，有可能会失败，这是因为有可能在配置网络的  时候DNS为谷歌的8.8.8.8，该地址对国内个别网站的解析并不完美，所以会提示无法找到主机。

  可以编辑/etc/resolv.conf 添加一条"nameserver 114.114.114.114"，别问为啥是这个DNS，因为好  记。

    6.yum makecache，然后记得yum install wget，然后想更换其他源可以直接用wget。不再举  例。

    BUG：在CentOS 7里，修改/etc/resolv.conf,并不能永久修改DNS，不过可以写在网卡里，不过修  改网卡配置文件需要重启网卡才能生效，写在/etc/resolv.conf中会立马生效，在研究中，详情请见  后续博文。

   备注：如有疑问请留言，如需转载请注明出处。