摘要：
备份原镜像 sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup sudo mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo 阅读全文
摘要：
centos7运行yum报如下提示： There are no enabled repos. Run "yum repolist all" to see the repos you have. To enable Red Hat Subscription Management repositorie 阅读全文