ノートパソコンで18.04から20.04.1にアップグレードしようとしましたが、Can not upgrade - Your python3 install is corrupted. Please fix the '/usr/bin/python3' symlink."エラーが発生します。
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1825655無駄でした。出力は次のようにls -l /usr/bin/python*なります。
$ ls -l /usr/bin/python*
lrwxrwxrwx 1 root root 18 ago 9 11:57 /usr/bin/python -> /usr/bin/python2.7
lrwxrwxrwx 1 root root 9 apr 16 2018 /usr/bin/python2 -> python2.7
-rwxr-xr-x 1 root root 3665768 lug 20 17:37 /usr/bin/python2.7
lrwxrwxrwx 1 root root 33 lug 20 17:37 /usr/bin/python2.7-config -> x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root 16 apr 16 2018 /usr/bin/python2-config -> python2.7-config
lrwxrwxrwx 1 root root 25 ago 3 16:03 /usr/bin/python3 -> /etc/alternatives/python3
-rwxr-xr-x 2 root root 4526456 lug 17 14:50 /usr/bin/python3.6
-rwxr-xr-x 2 root root 4526456 lug 17 14:50 /usr/bin/python3.6m
-rwxr-xr-x 2 root root 5308240 giu 29 07:44 /usr/bin/python3.7
lrwxrwxrwx 1 root root 33 giu 29 07:44 /usr/bin/python3.7-config -> x86_64-linux-gnu-python3.7-config
-rwxr-xr-x 2 root root 5308240 giu 29 07:44 /usr/bin/python3.7m
lrwxrwxrwx 1 root root 34 giu 29 07:44 /usr/bin/python3.7m-config -> x86_64-linux-gnu-python3.7m-config
-rwxr-xr-x 1 root root 398 nov 15 2017 /usr/bin/python3-jsonschema
lrwxrwxrwx 1 root root 10 ott 25 2018 /usr/bin/python3m -> python3.6m
lrwxrwxrwx 1 root root 16 apr 16 2018 /usr/bin/python-config -> python2.7-config
明らかに、操作可能状態に戻るまでに時間が無駄になるとしても、Ubuntu を完全に再インストールするのが最善でしょうか?