Intro

Converted the 'tx2' PC from CentOS8 8.3 to Rocky Linux 8.4
Ref: Tecmint.com, and rockylinux.org

Migration

Before:
   cat /etc/redhat-release
   CentOS Linux release 8.3.2011

Used the migrate2rocky.sh script. Website says you do not need to update to lastest CentOS.

wget the script:
   wget https://raw.githubusercontent.com/rocky-linux/rocky-tools/main/migrate2rocky/migrate2rocky.sh
   chmod +x migrate2rocky.sh

execute the script, reboot when finished:
   bash migrate2rocky.sh -r
   reboot

after:
   cat /etc/redhat-release
   Rocky Linux release 8.4 (Green Obsidian)