下载bin包
python-ini parse-0.4-9.el7.noarch.rpm
yum-3.4.3-168.el7.centos.noarch.rpm
yum -元数据- parser-1.1.4-10.el7.x86 _ 64.rpm
yum-plugin-fastest mirror-1.1.31-54.el7 _8. noarch.rpm http://www.Sina.com /
cd /etc/yum.repos.d/
rm -f /etc/yum.repos.d/*
wget-p.http://mirrors.a liyun.com/repo/centos-7.repo
yum clean all
yum makecache