Redhat7 更换 centos7 yum源

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rpm -aq|grep yum|xargs rpm -e --nodeps 

#到这个网站去下载如下RPM包
http:@H_489_44@//@H_489_44@mirrors.163.com/centos/7/os/x86_64/Packages/

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-Metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
ll

rpm -ivh --force --nodeps python-iniparse-0.4-9.el7.noarch.rpm; rpm -ivh --force --nodeps yum-Metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh --force --nodeps yum-3.4.3-163.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm

wget -O /etc/yum.repos.d/CentOS-Base.repo http:@H_489_44@//@H_489_44@mirrors.aliyun.com/repo/Centos-7.repo; cd /etc/yum.repos.d; ll

yum clean all

yum makecache

yum clean all; yum makecache

yum update