An upgrade from 'disco' to 'focal' is not supported with this tool

Question

I am very beginner, I want to upgrade Ubuntu 19.04 to 20, I do command below:

$ sudo apt update 
$ sudo apt upgrade
$ sudo apt dist-upgrade
$ sudo apt autoremove
$ sudo apt install update-manager-core

source repository is http://old-releases.ubuntu.com/ubuntu and upgrade behavior is normal.

I think the above commands are run without problems. result after any command is:

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

but after run do-release-upgrade , I can not upgrade and display :

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.
=== Command terminated with exit status 1 (Sun Jul 19 03:33:35 2020) ===

What should I do?

Ubuntu 19.04 is now unsupported. I suggest you perform a fresh installation of 20.04 — Archisman Panigrahi, Jul 19 '20 at 05:10
You can't jump from 19.04 to 20.04 Can I skip over releases when upgrading?. — Ravexina, Jul 19 '20 at 05:20
The fully tested way of upgrading is either from one release to the next (ie. 19.04 to 19.10), OR if you are on a LTS you have the option of the next release (ie. 18.04 to 18.10) OR jumping from 18.04 to the next LTS release, ie. 18.04 LTS to 20.04 LTS. 19.04 wasn't a LTS so the fully tested path is to 19.10. You don't need to start again via re-install (use 'something-else' & don't format). — guiverc, Jul 19 '20 at 06:05

An upgrade from 'disco' to 'focal' is not supported with this tool

0 Answers0