Solve the failure of yum source in CentOS8

Original link: https://blog.singee.me/2023/06/07/baf5a24c337a4c3f8666398d601f97d5/

Let me make a complaint first, why does CentOS break a system that is running normally?

If no other mirror has been configured before

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 sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

If configured, just change the domain name in baseurl to http://vault.centos.org (note that only HTTP is supported)

The reason is that because CentOS 8 is Deprecated, the warehouse is deleted in Mirror ?

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