CentOS 8.x migrate to CentOS 8.x Stream

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If you have older CentOS 8 machines they wont work now as repositories have been discontinued. To make them usable, we can migrate from CentOS to CentOS 8.x stream using:

1. Change all repository configuration as follows
   1. Go to folder /etc/yum.repos.d/
   2. For every enabled repository do following:
      1. Comment mirrorlist
      2. Uncomment baseurl
      3. Change baseurl domain from mirror.centos.org to vault.centos.org
2. Fully update machine

   dnf update -y --skip-broken --nobest

   It should take OS to "8.5.2111" (' cat /etc/centos-release')

3. Install stream packages and swap repos

   dnf install centos-release-stream -y
   dnf swap centos-{linux,stream}-repos -y
   dnf distro-sync -y
   shutdown -r now

4. After reboot check

   cat /etc/*release

   It should now be "CentOS stream release 8"

Refer:

• https://www.layerstack.com/resources/tutorials/How-to-migrate-from-CentOS8-to-CentOSStream

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