yum不成功

yum原配置好了，确认没有问题，然后yum list报错：

[root@ectona ~]# yum list
Loaded plugins: product-id, refresh-packagekit, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
file:///mnt/cdrom/Server/repodata/repomd.xml: [Errno 14] Could not open/read file:///mnt/cdrom/Server/repodata/repomd.xml
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: rhel-source. Please verify its path and try again

试了很多方法，都快崩溃了，后来。。

 rm -f /etc/yum.repos.d/rhel-source.repo 

yum list成功了！！

就因为默认的配置文件存在呀！

冬天，好冷。