Linux Shout published a tutorial about migrating from CentOS 8 Linux to AlmaLinux 8.
How to migrate from CentOS 8 Linux to AlmaLinux 8
Follow the steps to safely migrate and replace your exsiting CentOS 8 Linux to AlmaLinux using command line script available on GitHub.
How to migrate from CentOS 8 Linux to AlmaLinux 8 - Linux Shout