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I am using Ubuntu 22.10 on a Digital Ocean image. I try to run this command:

sudo apt-add-repository -y ppa:brightbox/ruby-ng

but I get these specific error messages in output;

Err:3 http://old-releases.ubuntu.com/ubuntu kinetic-security Release                                                         
  404  Not Found [IP: 185.125.190.37 80]
Err:8 https://ppa.launchpadcontent.net/brightbox/ruby-ng/ubuntu kinetic Release
  404  Not Found [IP: 185.125.190.52 443]

E: The repository 'http://old-releases.ubuntu.com/ubuntu kinetic-security 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 'https://ppa.launchpadcontent.net/brightbox/ruby-ng/ubuntu kinetic 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.

So I tried given solutions in these sources:

https://stackoverflow.com/questions/53800051/repository-does-not-have-a-release-file-error
How can I fix a 404 Error when using a PPA or updating my package lists?
https://futurestud.io/tutorials/how-to-fix-ubuntu-debian-apt-get-404-not-found-repository-errors

Besides, I tried apt update and got the same errors above.

Turhan Ergene
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    "kinetic" (22.10) was just released so it makes no sense to have an "old-releases" repository, it doesn't exist. You need to correct that either by editing or removing. The PPA exists but hasn't been updated since 2021 therefore it has nothing for your release. Remove it. – ChanganAuto Oct 28 '22 at 23:33
  • you mean from source.list ? – Turhan Ergene Oct 28 '22 at 23:51
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    Does this answer your question? What can I do if a repository/PPA does not have a Release file? – guiverc Oct 29 '22 at 01:17
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    PPAs are 3rd party software sources so all security checks are on you to perform before adding.. A quick glance & I can see the PPA you added hasn't had any attention since 2020 (20.04) and provides no support for later release; did you check? It has nothing helpful for 22.10 and the lack of maintenance should have felt a security risk to you (https://launchpad.net/~brightbox/+archive/ubuntu/ruby-ng) – guiverc Oct 29 '22 at 01:30

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