Error installing virtualbox in ubuntu 20.04 host

[bb53]

Today I saw that Ubuntu 20.04 was mentioned on the linux_downloads page for the first time. Following the instructions there I did:
- Added a line to /etc/apt/sources.list, ending ...debian focal contrib
- wget ...
- sudo apt-get update
Output from this included:
E: The repository '...debian focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.

Does this mean that the repository is not correctly set up?

[ajgreeny]

It simply means that you need to edit that line in sources.list and replace focal with eoan then refresh repos again.

This is not mentioned in the download pages, though if you read it carefully they do not mention using the word focal in the line; they mention only eoan as the latest line entry.

[ajgreeny]

It appears that the focal repos have now been added so you can now ignore my previous post and use focal in the sources.list file.

[bb53]

Thanks.
Yes I realised that "focal" wasn't mentioned on the downloads page. And it still isn't (even though sudo apt-get update now works correctly with focal)!

[ajgreeny]

Yes, the repos were updated a few days ago and now do include a focal repo, even though the .deb package is still named as the eoan version, I believe.