Question
N: Missing Signed-By in the sources.list(5) entry for 'http://mirrors.digitalocean.com/ubuntu'
I recently upgrade from ubuntu 23.10 to 24.04 using the do-release-upgrade command. Everything went fine and the upgrade completed. However every time I do the apt update command I get this.
Hit:1 http://mirrors.digitalocean.com/ubuntu noble InRelease
Hit:2 http://mirrors.digitalocean.com/ubuntu noble-updates InRelease
Hit:3 http://mirrors.digitalocean.com/ubuntu noble-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu noble-security InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
N: Missing Signed-By in the sources.list(5) entry for 'http://mirrors.digitalocean.com/ubuntu'
N: Missing Signed-By in the sources.list(5) entry for 'http://mirrors.digitalocean.com/ubuntu'
N: Missing Signed-By in the sources.list(5) entry for 'http://mirrors.digitalocean.com/ubuntu'
It doesn’t seem to affect the system but any help getting rid of this warning would be appreciated.
This is what “cat /etc/apt/sources.list.d/ubuntu.sources” outputs
Types: deb
URIs: http://security.ubuntu.com/ubuntu
Suites: noble-security
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
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So I found the solution. There is the file “third-party.sources” in “/etc/apt/sources.list.d” add “Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg” to the end of it.
Missing the signed key for third-party.sources
Doing this via ssh should fix it.
Then at the end of the file add this line.
Final file should look something like this.