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Err:10 http://ppa.launchpad.net/aims/sagemath/ubuntu focal Release
  404  Not Found [IP: 2001:67c:1560:8008::19 80]
Err:11 http://ppa.launchpad.net/morphis/anbox-support/ubuntu focal Release
  404  Not Found [IP: 2001:67c:1560:8008::19 80]
Err:12 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu focal Release
  404  Not Found [IP: 2001:67c:1560:8008::19 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/aims/sagemath/ubuntu 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.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/morphis/anbox-support/ubuntu 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.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu 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.
N: See apt-secure(8) manpage for repository creation and user configuration details.
N0rbert
  • 99,918
Aravind Karthigeyan
  • 11
  • The first link I looked up shows clearly it doesn't support focal or 20.04. PPA's are 3rd party software sources; meaning all security checks are on you (are they trustworthy, reputable, maintained, support your system etc). Did you perform those checks before adding them? https://launchpad.net/~aims/+archive/ubuntu/sagemath – guiverc Jun 20 '21 at 11:28

1 Answers1

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You have to disable all three PPAs, which do not support Ubuntu 20.04 LTS (focal):

sudo apt-add-repository -r ppa:aims/sagemath
sudo apt-add-repository -r ppa:morphis/anbox-support
sudo apt-add-repository -r ppa:ubuntu-wine/ppa

and then run update+upgrade procedure again:

sudo apt-get update
sudo apt-get upgrade
N0rbert
  • 99,918