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I am using Ubuntu 20.04.3 LTS.

~ sudo apt update
E: Conflicting values set for option Signed-By regarding source https://apt.kitware.com/ubuntu/ focal: /usr/share/keyrings/kitware-archive-keyring.gpg !=
E: The list of sources could not be read.

As a total newbie, I have no idea what to do. Any guidance would be most appreciated. Hopefully, a similar question has been asked in the past and one of you can kindly link to it. My search for duplicates was not very successful.

muru
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Rodrigo de Azevedo
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  • https://apt.kitware.com/ : If you really think you still need this cmake repo, please run the script kitware-archive.sh – Knud Larsen Sep 06 '21 at 17:57
  • @KnudLarsen Thank you. If I recall correctly, I had the same error message when I tried to run the script kitware-archive.sh. Eventually, I managed to solve the problem. – Rodrigo de Azevedo Oct 08 '21 at 19:21

1 Answers1

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Finally, I solved the problem by commenting the following line in file /etc/apt/sources.list.

deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ focal main # disabled on upgrade to focal
Rodrigo de Azevedo
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