Error: "Failed to download repository Information."

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Hello All,
I have an issue updating my system in the last week. Not sure what I had changed to case this issue, but I now get the following error from Software Updater:

"Failed to download repository Information."

The following error show up when I run "sudo apt update"

Hit:1 https://brave-browser-apt-release.s3.brave.com stable InRelease
Ign:2 http://linux.dropbox.com/ubuntu disco InRelease                          
Hit:3 https://mirror.esecuredata.com/ubuntu-archive jammy InRelease            
Hit:4 https://mirror.esecuredata.com/ubuntu-archive jammy-updates InRelease    
Hit:5 https://mirror.esecuredata.com/ubuntu-archive jammy-backports InRelease  
Hit:6 https://packages.microsoft.com/repos/ms-teams stable InRelease           
Hit:7 https://mirror.esecuredata.com/ubuntu-archive jammy-security InRelease   
Hit:8 http://linux.dropbox.com/ubuntu disco Release                            
Hit:9 https://repo.protonvpn.com/debian stable InRelease                       
Err:6 https://packages.microsoft.com/repos/ms-teams stable InRelease           
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
Hit:10 https://esm.ubuntu.com/apps/ubuntu jammy-apps-security InRelease        
Err:11 http://linux.dropbox.com/ubuntu disco Release.gpg                       
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FC918B335044912E
Hit:12 https://esm.ubuntu.com/apps/ubuntu jammy-apps-updates InRelease         
Get:13 https://mega.nz/linux/repo/xUbuntu_22.04 ./ InRelease [2,961 B]         
Hit:14 https://esm.ubuntu.com/infra/ubuntu jammy-infra-security InRelease      
Hit:15 https://esm.ubuntu.com/infra/ubuntu jammy-infra-updates InRelease       
Hit:16 https://ppa.launchpadcontent.net/gerardpuig/ppa/ubuntu jammy InRelease
Hit:17 https://linux.teamviewer.com/deb stable InRelease                       
Fetched 2,961 B in 7s (418 B/s)                                                
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
2 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.microsoft.com/repos/ms-teams stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://linux.dropbox.com/ubuntu disco Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FC918B335044912E
W: Failed to fetch https://packages.microsoft.com/repos/ms-teams/dists/stable/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
W: Failed to fetch http://linux.dropbox.com/ubuntu/dists/disco/Release.gpg  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FC918B335044912E
W: Some index files failed to download. They have been ignored, or old ones used instead.

I tried to do the following but seem to be digging myself in to a hole:

sudo apt-get clean
sudo apt-get update
sudo apt-get upgrade

And when I try a different server on Software & Updates when I try to do a Cache Refresh, I get a huge error from the during the Cache Refresh which has something to do with the public keys.

image
image1366×768 226 KB

Any help will be greatly appreciated before I completely bury myself.

Thank you,
Mike Wittek

2

I found this....

1 Like
3

I tried the following and I got the following result:

mike@mike-HP-EliteBook-Folio-9470m:~$ gpg --keyserver keyserver.ubuntu.com --recv-keys EB3E94ADBE1229CF
gpg: keyserver receive failed: Connection timed out
mike@mike-HP-EliteBook-Folio-9470m:~$ sudo gpg --keyserver keyserver.ubuntu.com --recv-keys EB3E94ADBE1229CF
gpg: keyserver receive failed: Connection timed out

Thanks,
Mike W.

4

Adding to the very good and useful reply of @geekbone (Stephen Yates) which had you solve the microsoft teams problem, I'll try to explain the other error you mentioned:

It occurs to me that you are trying to add a key for this repository:

This will continue to fail because Ubuntu "disco dingo" (19.05) is no longer supported ( in other words: the 3 year MATE-support and the 5 year Ubuntu subsystem support has expired by now)

Best to remove that repository and follow the "Option 1: Install Dropbox from system repository" from this article here:

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