I used Ubuntu Bionic. I have, among others, the following apt sources configured

deb https://mkvtoolnix.download/ubuntu/bionic/ ./
deb-src https://mkvtoolnix.download/ubuntu/bionic/ ./

when I apt-get update, it fails on this repo, telling me:

E: The repository 'https://mkvtoolnix.download/ubuntu/bionic ./ 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.

I browsed around, and found a suggestion to use apt-get update --allow-insecure-repositories, but that just changed the error messages I'm getting and didn't resolve the problem.


1 Answer 1


It seems the structure of the repository changed at some point. Replace those two lines with the following:

deb https://mkvtoolnix.download/ubuntu/ bionic main
deb-src https://mkvtoolnix.download/ubuntu/ bionic main 

and that should satisfy apt-get and let you update.

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