====== Updating CentOS 8 Repositories ======

Follow these steps to update CentOS 8 repositories to functional versions:

===== 1. Backup Existing Configuration =====

Backup the existing configuration files:

<code bash> sudo cp /etc/yum.repos.d/CentOS-* /tmp/ </code>
===== 2. Remove Old Files =====

Delete the old repository files:

<code bash> sudo rm -f /etc/yum.repos.d/CentOS-* </code>
===== 3. Create AppStream Repository =====

Create a new configuration file for the AppStream repository:

<code bash>
sudo vi /etc/yum.repos.d/CentOS-Stream-AppStream.repo 
</code>

Add the following content:

<code>
[appstream]
name=CentOS Stream $releasever - AppStream
baseurl=http://vault.centos.org/centos/8-stream/AppStream/$basearch/os/
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
</code>
===== 4. Create BaseOS Repository =====

Create a file for BaseOS:

<code bash>
sudo vi /etc/yum.repos.d/CentOS-Stream-BaseOS.repo
</code>

Add the following content:

<code>
[baseos]
name=CentOS Stream $releasever - BaseOS
baseurl=http://vault.centos.org/centos/8-stream/BaseOS/$basearch/os/
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
</code>
===== 5. Clean and Regenerate Cache =====

Clean the yum cache and regenerate it:

<code bash>
sudo dnf clean all 
sudo dnf makecache
</code>
===== 6. Update System =====

Now you can try to update the system:

<code bash> sudo dnf update </code>

<note>
These repositories use vault.centos.org, which should be functional for CentOS 8 Stream.
</note>