centos7运行yum报如下提示：Run "yum repolist all" to see the repos you have

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 repositories:
     subscription-manager repos --enable <repo>
 To enable custom repositories:
     yum-config-manager --enable <repo>

解决办法：

yum -y install yum-utils

然后你查看你的/etc/yum.repos.d文件夹下有没有出现CentOS-Base.repo文件

如果不能运行先试着更换yum源：

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

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
或者

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

如果wget不能安装使用，就自己在网上下载scp移动到目录下执行下面命令：

yum clean all
yum makecache

安装完成后，再执行命令就可以了

centos7运行yum报如下提示：Run "yum repolist all" to see the repos you have

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