确认文档
ls -l /etc/yum.repos.d/
查询Repository全名
rpm -qf /etc/yum.repos.d/epel.repo
移除Repository
yum remove epel-release-7.noarch
清除Repository快取
cd /var/cache/yum/x86_64/7/
% 清除的文件夹会以Repository名称命名或类似
rm -rf epel
更新yum
yum update
ls -l /etc/yum.repos.d/
rpm -qf /etc/yum.repos.d/epel.repo
yum remove epel-release-7.noarch
cd /var/cache/yum/x86_64/7/
% 清除的文件夹会以Repository名称命名或类似
rm -rf epel
yum update