mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backupmv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repo
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backupmv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repo