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When I ran:

sudo apt-get update

I got these errors:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://cli.github.com/packages stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
W: Failed to fetch https://cli.github.com/packages/dists/stable/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
W: Some index files failed to download. They have been ignored, or old ones used instead.

So following other answers here, I tried to update the key using this:

sudo apt-key adv --recv-key --keyserver keyserver.ubuntu.com 23F3D4EA75716059

Which returned this:

Executing: /tmp/apt-key-gpghome.UZIznQa775/gpg.1.sh --recv-key --keyserver keyserver.ubuntu.com 23F3D4EA75716059
gpg: key 23F3D4EA75716059: public key "GitHub CLI <opensource+cli@github.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1

But when I run "sudo apt-get update" again, I get the same errors (see above) again.

I'm pretty much a Linux newbie. Can anyone see what I'm doing wrong? Thanks.

Here's the output of cat /etc/apt/sources.list:

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ca.archive.ubuntu.com/ubuntu/ focal main restricted

Major bug fix updates produced after the final release of the


distribution.


deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted


N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu


team, and may not be under a free licence. Please satisfy yourself as to


your rights to use the software. Also, please note that software in


universe WILL NOT receive any review or updates from the Ubuntu security


team.


deb http://ca.archive.ubuntu.com/ubuntu/ focal universe
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe


N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu


team, and may not be under a free licence. Please satisfy yourself as to


your rights to use the software. Also, please note that software in


multiverse WILL NOT receive any review or updates from the Ubuntu


security team.


deb http://ca.archive.ubuntu.com/ubuntu/ focal multiverse
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse


N.B. software from this repository may not have been tested as


extensively as that contained in the main release, although it includes


newer versions of some applications which may provide useful features.


Also, please note that software in backports WILL NOT receive any review


or updates from the Ubuntu security team.


deb http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse


Uncomment the following two lines to add software from Canonical's


'partner' repository.


This software is not part of Ubuntu, but is offered by Canonical and the


respective vendors as a service to Ubuntu users.


deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu bionic partner


deb http://security.ubuntu.com/ubuntu focal-security main restricted
deb http://security.ubuntu.com/ubuntu focal-security universe
deb http://security.ubuntu.com/ubuntu focal-security multiverse


deb http://archive.canonical.com/ubuntu lsb_release -cs partner


deb-src http://archive.canonical.com/ubuntu lsb_release -cs partner
Rick Cooper
  • 1
  • What is the output of cat /etc/apt/sources.list – Rishon_JR Feb 25 '23 at 12:17
  • @Rishon JR See edited question with the output you requested. – Rick Cooper Feb 26 '23 at 15:52
  • Your sources look fine... There's something wrong with the key. Try sudo apt-key del 23F3D4EA75716059 && sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key C99B11DEB97541F0 && sudo apt-get update – Rishon_JR Feb 27 '23 at 09:50
  • @Rishon JR Before I run your code, want to check the key in the second command, starts with C99B.... Shouldn't that key be the same as the one in the first command: starts with 23F3... ? – Rick Cooper Feb 27 '23 at 23:44
  • I looked it up again... and it's the correct key for ubuntu 20.04. (I would recommend upgrading to ubuntu 22.04 LTS using sudo do-release-upgrade). If you are not willing to upgrade, do sudo apt-key del 23F3D4EA75716059 && sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-key C99B11DEB97541F0 && sudo apt-get update – Rishon_JR Feb 28 '23 at 09:37
  • @RishonJR No luck. "apt-get update" returns exactly the same errors re NO_PUBKEY 23F3D4EA75716059. I would like to upgrade to 22.04 LTS but cannot; if I run do-upgrade-release, I get "Please install all available updates for your release before upgrading.". – Rick Cooper Feb 28 '23 at 16:36
  • Make a live USB and use that to upgrade (In the install options there will be upgrade ubuntu alongside reinstall ubuntu and other options as well). – Rishon_JR Mar 01 '23 at 10:50
  • Hi Rick, Any update? – Rishon_JR Mar 02 '23 at 15:18
  • @Rishon_JR Just saw this and I'll give it a try. Thanks for the suggestion. I'll let you know how it works. – Rick Cooper Mar 03 '23 at 21:26
  • @Rishon_JR. Sheesh, I've messed up. I created a LiveUSB with 22.04. Installed 22.04 but selected "Install along side 20.04" since I was afraid of messing up my current set up. But now I'm really messed up since none of my Home files and apps are available when I boot into 22.04. I should have realized this was happening when the install process forced me to create another partition (for 22.04). Can I unroll this somehow and install 22.04 on top of and in place of 20.04? – Rick Cooper Mar 05 '23 at 17:54
  • Let's move the discussion to chat. – Rishon_JR Mar 06 '23 at 03:03
  • I have the same issue. How is this eventually fixed? – itsjc Mar 09 '24 at 12:09

0 Answers0