我正在尝试在 Centos 7 上添加 epel.repo。看起来它安装得很好，但它没有显示在列表中，也无法使用它。这是我运行的命令及其输出。我还缺少其他东西吗？
$ sudo yum install epel-release
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-5 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
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Package Arch Version Repository Size
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Installing:
epel-release noarch 7-5 extras 14 k
Transaction Summary
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Install 1 Package
Total size: 14 k
Installed size: 24 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test …centos ×1