所需要的yum的rpm包：
推荐安装网址：
1.http://blog.csdn.net/eddy_chan/article/details/54728385
2.http://blog.csdn.net/jb19900111/article/details/50700042
进入网站下在所需的包 http://mirrors.163.com/centos/7/os/x86_64/Packages/
所需的包的及版本如下
yum-3.4.3-132.el7.centos.0.1.noarch.rpm
yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm
yum-updateonboot-1.1.31-34.el7.noarch.rpm
yum-utils-1.1.31-34.el7.noarch.rpm
python-iniparse-0.4-9.el7.noarch.rpm安装步骤：
1.查看自带的yum:rpm -qa |grep yum
2.卸载自带的yum:rpm -e .... --nodeps
3.查看并卸载自带的python-urlgrabber : rpm -qa | grep python-urlgrabber
4.卸载：rpm -e ... --nodeps
5.安装python:rpm -ivh python-urlgrabber-3.10-8.el7.noarch.rpm 下图表示安装成功
6.安装其他的rpm ： rpm -ivh yum-*
7.配置yum源数据：
-
cd /etc/yum.repos.d/
-
在 /etc/yum.repos.d/下创建一个repo结尾的文件(名称没关系)
-
编辑vi /etc/yum.repos.d/xiao.repo
- 添加以下内容内容:
[base]
name=CentOS-7 - Base - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=os
baseurl=http://mirrors.163.com/centos/7/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-7 - Updates - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=updates
baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-7 - Extras - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=extras
baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-7 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-78.yum clean all 清除原有缓存
9.yum makecache 获取yum列表(需要网络)
10.yum repolist可以查看源数据,出现下图代表成功
