At this time, I am unable to update from Disco 19.04 to Focal 20.04. I have read several current questions that have been closed, referring to some really old questions. I have already read all the 8 year old threads and followed those instructions. They were helpful but they don't solve my problem. I have read all the questions suggested to me while typing this. Please don't close my thread and refer to the old ones as they do not resolve this issue, which is NEW (as in, it has been 8 years already since those questions were answered and they don't address my problem).
After trouble shooting and replacing "archive" with "old-releases" and eliminating all the third party packages from the source list, I am able to "apt update" and "apt upgrade" and the system is up to date.
I have tried "full-upgrade", "dist-upgrade" and everything else I can think of. All now say:
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
I already fixed all the error messages I was getting using all the suggestions in all the other threads I have already read.
When I run "do-release-upgrade", I get the following output:
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit: http://www.ubuntu.com/releaseendoflife
Get:1 Upgrade tool signature [1,554 B]
Get:2 Upgrade tool [1,337 kB]
Fetched 1,338 kB in 0s (0 B/s)
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg'
extracting 'focal.tar.gz'
Reading cache
Checking package manager
Can not upgrade
An upgrade from 'disco' to 'focal' is not supported with this tool.
When I user the Software Upgrade graphical tool, I get the following:
Can not upgrade: An upgrade from 'disco' to 'focal' is not supported with this tool.
This computer has many users and much software loaded and I cannot do a fresh install. First, I don't know how to do so while saving all the users, files and programs and second, I foresee a nightmare scenario of a blown up computer with everything gone.
If I can upgrade from 19.04 to 19.10, I have been unable to figure it out. I am pretty sure it can't be done since 19.04 is no longer supported.
In case it matters, my disk is encrypted.
Please, please, please someone tell me there is a way to get from 19.04 to 20.04 without a fresh install, saving all my users, data and programs! I would be absolutely shocked if there is no way to upgrade simply because I missed the update deadline. If not, I will be forced to buy a new computer!