今天笔者在公司redhat 6.x/7.x服务器上使用yum命令报如下错误：
[root@qq_5201351 ~]# yum list Loaded plugins: product-id, refresh-packagekit, search-disabled-repos, security, subscription-manager https://cdn.redhat.com/content/dist/rhel/server/6/6Server/x86_64/os/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 403 Forbidden" Trying other mirror. To address this issue please refer to the below knowledge base article https://access.redhat.com/solutions/69319 If above article doesn't help to resolve this issue please open a ticket with Red Hat Support. Error: Cannot retrieve repository metadata (repomd.xml) for repository: rhel-6-server-rpms. Please verify its path and try again
为了排错，笔者只留下了一个redhat.repo(这个文件移动走了，默认也会自动生成)，还是报如上错误
对于这个403错误，笔者刚开始在思考是不是/etc/yum.conf配置中的代理服务器返回的，于是在自己电脑上访问上面的url也是403错误
后又想了下，代理服务器应该也不会干这样的事，应该更可能还是服务器自身的问题，
对于yum，红帽系统是使用到了订阅这个概念的，于是检查，license及订阅信息，结果如下：
[root@qq_5201351 ~]# subscription-manager list +-------------------------------------------+ Installed Product Status +-------------------------------------------+ Product Name: Red Hat Enterprise Linux Server Product ID: 69 Version: 6.10 Arch: x86_64 Status: Subscribed Status Details: Starts: 05/30/2020 Ends: 05/30/2021
看着也没有问题啊，最后反复看到上面的报错信息，猛然发现了有个链接，https://access.redhat.com/solutions/69319
不过好像需要订阅了的才能看到详情，解决方案的大体意思是要重新注册订阅，于是重新注册后，问题得到解决！
If an still issue persists, then unregister the system and register again using the following commands: # subscription-manager unregister # subscription-manager clean # subscription-manager register Subscribe the system with the required subscription(s) or use auto subscribe option to automatically assign subscription to the system. # subscription-manager attach --auto Clean yum cache and try running yum command to confirm whether yum works or not. # yum clean all # yum repolist If there is Proxy server required to connect to the internet then configure the proxy server. In /etc/yum.conf please add the proxy details as stated in the article : e.g. proxy=http://mycache.mydomain.com:3128 # The account details for yum connections proxy_username=proxy-user proxy_password=password.
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