ubuntu20.04lts
4月23日にRaspberryuPIのubuntu20.04リリースされたようなのでアップグレードしようとしたが
xxx@pi4b:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
There is no development version of an LTS available.
To upgrade to the latest non-LTS development release
set Prompt=normal in /etc/update-manager/release-upgrades.
xxx@pi4b:~$ sudo emacs /etc/update-manager/release-upgrades
xxx@pi4b:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
No new release found.
とまだダメ見たい。