CLOUD技术博It seems like your question is incomplete or unclear. You mentioned several operating system versions:
- Alibaba Cloud Linux 3.21.04
- CentOS 8.2
- Ubuntu 20.?
Are you asking about:
- Differences between these distributions?
- Compatibility of software across them?
- Which one to choose for a specific use case?
- How to upgrade/migrate between them?
- Or something else?
Please clarify your question so I can assist you better.