How to Migrate CentOS 7 to AlmaLinux 8

Upgrade CentOS 7 to latest version with

Reboot the server

Install elevate repo rpm file

Install leapp

Run pre upgrade check

After the preupgrade script run, it will generate a log file /var/log/leapp/leapp-report.txt, you need to fix any problems reported in this file.

On CentOS 7, you need to run these 2 commands as they will cause upgrade blocking.

Run the upgrade

During the upgrade, server will reboot itself. This process can take a while to finish. Don’t interrupt the process or you will end up with non working server.

Once the upgrade process is finished, reboot the server.

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