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I've been trying to run sudo apt update and I get this output that doesn't seem to actually update:

Hit:1 https://repo.steampowered.com/steam stable InRelease

Hit:2 http://dl.google.com/linux/chrome/deb stable InRelease
               
Hit:3 http://packages.microsoft.com/repos/vscode stable InRelease
          
Get:4 http://kali.download/kali kali-rolling InRelease [30.5 kB]
        
Err:4 http://kali.download/kali kali-rolling InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
Reading package lists... Done
W: GPG error: http://kali.download/kali kali-rolling InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
E: The repository 'http://http.kali.org/kali kali-rolling InRelease' is not signed.
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.

It doesn't seem to actually update (unless it is and I just can't see it), and I don't know what's causing the issue. I'm running Ubuntu 20.04.1 LTS with AMD64 build. Does anyone have a possible theory to what this is, or even a fix?

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5
  • Only Ubuntu and official flavors of Ubuntu (ubuntu.com/download/flavours) are on-topic here, refer to askubuntu.com/help/on-topic where you'll find other SE sites where you question will be welcome if you don't want to use a Kali forum. (One advantage of Ubuntu is it's many support options, you opted for Kali so take advantage of it's support options, or SE Unix & Linux)
    – guiverc
    Aug 1, 2020 at 22:01
  • Does this answer your question? How do I restore the default repositories? and Updated Ubuntu 16.04, now I'm running Kali?
    – karel
    Aug 1, 2020 at 22:04
  • @guiverc I'm not running Kali linux, I added a Kali linux repository. I am running Ubuntu 20.04, like I stated in my question
    – jethr0
    Aug 1, 2020 at 22:11
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    It is obvious that you have so many Kali Linux sources in your repository, remove them and update your apt.
    – Ruby
    Aug 1, 2020 at 23:12
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    You maybe were running Ubuntu 20.04, however by adding Kali repositories your system may no longer be a Ubuntu one (apt and dpkg will always update to the latest packages, and if that's a debian or kali one, your system will change). I'd suggest checking if via ubuntu-security-status how much you've installed, as if you've installed some, you may have a big job removing them, or need to restore backups. If however you've got none, I'd advise removing those entries from your repository lists. Your post only shows off-topic repositories, nothing official Ubuntu or from 20.04.1
    – guiverc
    Aug 1, 2020 at 23:39

1 Answer 1

Reset to default
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I had almost this exact same problem last night. I ran sudo apt-get update and looked for any repositories that I no longer used, removed them, and everything seems to work.

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  • That seems to be what caused the problem, I removed the oracle-java repo as it was supposedly out-of-date and not working with my version of Ubuntu, so I removed it and now I'm getting this problem
    – jethr0
    Aug 1, 2020 at 22:15
  • Have you tried sudo apt autoremove? You can also add the --purge flag to it. This has seemed to fix most of my issues when it comes to repo issues, among other things. If that doesn't work, then maybe this will: apt-key adv --keyserver hkp://keys.gnupg.net --recv-keys 7D8D0BF6 (edit keys for your need)
    – Jordan Miracle
    Aug 1, 2020 at 22:25

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