Summary: How to reinstall OS?
Content (required): I didn't backup my boot volume, are there any way to re-install my OS? I am using ubuntu.
Version (include the version you are using, if applicable):Ubuntu SMP Fri Nov 12 15:45:47 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux
Code Snippet (add any code snippets that support your topic, if applicable):