When I type the command: sudo apt-get update, I got the error below:

Err:12 http://ppa.launchpad.net/freyja-dev/unity-tweak-tool-daily/ubuntu focal Release
  404  Not Found [IP: 80]

E: The repository 'http://ppa.launchpad.net/freyja-dev/unity-tweak-tool-daily/ubuntu focal Release' does not have a Release file.

Here is a full output of my command:

command output

I would like to ask how to solve it. I am a novice and ask for help.


1 Answer 1


Unity tweak tool is already in the official ubuntu repository, look:

$ apt search unity tweak tool

unity-tweak-tool/focal,focal 0.0.7+-0ubuntu6 all
  configuration tool for the Unity desktop environment

Then you don't need anymore to have their repository installed. You can remove it from the /etc/apt/sources.list.d/ directory or its specific line from /etc/sources.list file. If you don't know how to remove the file or edit the file just ask. After that simply update again your installation with

# apt update 


$ sudo apt update
  • You mean that I need to remove 'freyja-dev-ubuntu-unity-tweak-tool-daily-focal.list' and 'freyja-dev-ubuntu-unity-tweak-tool-daily-focal.list.save' from sources.list.d folder?
    – Code Lover
    Dec 23, 2020 at 9:31
  • OK! I know what happens and solved it. Thank you so much!
    – Code Lover
    Dec 23, 2020 at 9:49

Not the answer you're looking for? Browse other questions tagged or ask your own question.