Error 'Missing Signed-By in the sources.list(5) entry for ...' after upgrading to Zorin premium

[JohanA]

Hi.

I Just want to get help solving an error I experienced after upgrading to Zorin 18 Premium.

When running the terminal command 'apt' I get the following error message.

Command 'sudo apt update':
'N: Missing Signed-By in the sources.list(5) entry for ...'
(In Swedish 'N: Saknad Signed-By i sources.list(5)-posten för ...')
... ”https://packages.zorinos.com/stable”
... ”https://packages.zorinos.com/patches”
... ”https://packages.zorinos.com/apps”
... ”Zorin OS Pro - Zorin OS
... ”https://packages.zorinos.com/drivers”

This is caused by a missing property in the package manager settings.

How do I find the Zorin PGP PUBLIC KEY BLOCK?

A suggested solution:

1. Click on the Start menu / System tools / Software updater (Swedish: Startmeny / Systemverktyg / Programuppdaterare).
2. Let the update finish.
3. Click on Settings
4. Go to Other software (Swedish: Övrig Programvara)
5. Select the line with 'Index of /stable/ ...'
6. Click on Edit
7. Click on Add in other fields (Swedish 'Andra fält').
8. Add the key 'Signed-By' and then as Value add the Zorin PGP PUBLIC KEY BLOCK.

My problem is that I can't find the Zorin PGP PUBLIC KEY BLOCK and I suspect that the free Zorin packages and the premium Zorin packages are signed with different keys but the sources are configured on the same line.

[Aravisian]

Can you please check this solution here:

N: Missing Signed-By in the sources.list(5) after running '$sudo apt-get update'

But You have a zorin.list.save File, a zorin.sources and zorin.sources.save File and a zorin-list.distUpgrade File. Hmm ... I would have an Idea what we could try. Open the Terminal and type: cd /etc/apt/sources.list.d/ and press Enter. Then you should see the Path at the Beginning of the Line. Then type: sudo cp zorin.list.distUpgrade zorin.list.save zorin.sources zorin.sources.save ~/Desktop That should copy the 4 Files to Your Desktop. Please check that they are there before continuing.…

and see if it helps you?

[JohanA]

Ah! That was a good instruction... I realize my system is a bit more messed up though so I need to rebuild my apt/sources.list.d folder completely

Now I know what to do at least

[zabadabadoo]

If you consider Aravisian's post#2 gave you the answer, please click the Solution under his post.

Let us know how the "rebuild" turns out.

[JohanA]

I downloaded the Zorin 18.1 ISO and replaced my files in '/etc/apt/sources.list.d' with the files in the ISO and now things works!