Apt update

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1

Ubuntu Version:
22.04 LTS

Problem Description:
Trying to install updates I am getting this error via the gui or apt update

Conflicting values set for option Signed-By regarding source https://repository.veeam.com/backup/linux/agent/dpkg/debian/public/ stable: /etc/apt/trusted.gpg.d/DEB-9BB5AC67.gpg != -----BEGIN PGP PUBLIC KEY BLOCK-----
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-----END PGP PUBLIC KEY BLOCK-----
E: The list of sources could not be read.dy been reported and resolved.

Anyone know how to fix this?

2

What is the output of
lsb_release -a; uname -a
Thanks

3

@unbuntunewbie02 Which version of Ubuntu are you using?

Please enter the correct information in the support template so we can help you.

Additionally, large blocks of terminal output are almost impossible to read and understand in plain text.

Use the preformatted text option in the composer.

Highlight the text and click on the </> icon to add code blocks.

Thanks

1 Like
4

I find it easier to click </> (or enter ```) on an empty line first; then CtrlV to paste — no extra step for highlighting, which can get difficult with longer output. It’s important to do this on an empty line, because otherwise one gets inline monospace (can’t really call that “pre-formatted”) text, which isn’t much better because of line wrapping.

5

Open Software & Updates>Other Software and disable that veeam.com repository. Now try to update.

Then work out what is wrong with that repository’s gpg key.

Regards

1 Like
6

There seems to be a newer sources.list entry, containing a Signed-By field with the above public key block, which conflicts with an older key in /etc/apt/trusted.gpg.d/DEB-9BB5AC67.gpg. I think, this should do it:

sudo mv /etc/apt/trusted.gpg.d/DEB-9BB5AC67.gpg{,.disabled}

That only disables the old key, in case you need to restore it. There may still be an older entry in sources.list, which references it, though. You can find that one by running this:

grep -irF DEB-9BB5AC67 /etc/apt/sources.list*

Or, it could be the other way around; you’d have to examine which is the current signing key of that repository.

Please put all log and other console/terminal output in pre-formatted code blocks (click the </> icon in the editor first and paste into the new element), ideally wrapped in a “Hide Details” element, if it’s more than just a few lines. See items 4 and 5 in the Posting Guide.

Optional helper script

If you are so inclined, I took it upon myself to provide a little helper script for that. :sweat_droplets:

7

using the disabled did not work. and the output of grep cmd

$ sudo grep -irF DEB-9BB5AC67 /etc/apt/sources.list*
/etc/apt/sources.list.d/veeam.list:deb [arch=amd64 signed-by=/etc/apt/trusted.gpg.d/DEB-9BB5AC67.gpg] https://repository.veeam.com/backup/linux/agent/dpkg/debian/public stable veeam
9

As I said, there may still be a file referencing it, which you have found:

(BTW, should avoid using sudo when not required, like here. See this discussion if you’re interested in the details.)

See what happens when you disable that sources file:

sudo mv /etc/apt/sources.list.d/veeam.list{,.disabled}

Then run sudo apt update; see if there is still a line for the veeam repository. If there isn’t, we need to take a closer look at all the sources.list files:

grep -r '' /etc/apt/sources.list*

On a more OpSec related note, while searching for installation instructions, to take a look at the sources.list creation procedure, I found this:

It’s probably not a good idea to do so blindly, because that undermines the very idea of Secure APT, and the PGP/GPG Web of Trust idea at its core, for that matter. One should always authenticate such keys first. That can be as easy as comparing the fingerprint against a public record of it, i.e. on the vendor’s TLS-signed and encrypted website, to be sure no Man-in-the-Middle attacker can do a switcheroo of said key, or the .deb package it is delivered in. Ideally such keys should be signed by some trusted 3rd party; IIRC, the signing keys of the Tor Project’s repository are signed by some Debian developers in debian-keyring. Explaining all that is out of scope here; feel free to open a new topic if you’re interested. Or just have a look at this:
https://wiki.debian.org/SecureApt#How_to_tell_if_the_key_is_safe

10

Disabling the Veeam sources file let me run a apt update and i am going to update the system while i can before proceed.

Output of the file below:

deb [arch=amd64 signed-by=/etc/apt/trusted.gpg.d/DEB-9BB5AC67.gpg] https://repository.veeam.com/backup/linux/agent/dpkg/debian/public stable veeam
1 Like