Question

1

sudo apt-get update fails public key is not available: NO_PUBKEY, sudo gpg --keyserver pgpkeys.mit.edu --recv-key also fails

rated 0 times [ 1] [ 0] / answers: 1 / hits: 6644 / 1 Year ago, fri, march 31, 2023, 1:07:29

Ubuntu 18.04
For some time now the graphical GUI Software Updater would report

Then click ok would give me

Then click Install Now

it would report loading for a fraction of a second then close. I should have been suspicious, but ...

Well, today I tried

sudo apt-get update

and got the following error

Get:14 https://packagecloud.io/shiftkey/desktop/any any InRelease
[23.2 kB] Err:14
https://packagecloud.io/shiftkey/desktop/any any InRelease The
following signatures couldn't be verified because the public key is
not available: NO_PUBKEY B7E65990E879472F Reading package lists...
Done W: GPG error: https://packagecloud.io/shiftkey/desktop/any any
InRelease: The following signatures couldn't be verified because the
public key is not available: NO_PUBKEY B7E65990E879472F E: The
repository 'https://packagecloud.io/shiftkey/desktop/any any
InRelease' is not signed.

askubuntu.com/questions/849919/fail-to-sudo-apt-get-update

suggests

sudo apt-get --allow-unauthenticated update

but this fails too.

fix-apt-get-update-the-following-signatures-couldnt-be-verified-because-the-public-key-is-not-available
many more questions with same answer
and more

suggests

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys xxxx

but this fails too "gpg: keyserver receive failed: No data".

Suggestions for what to do next would be appreciated.

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armis

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answered 1 Year ago tresein · Accepted Answer

If you look at the repository's webpage (https://packagecloud.io/shiftkey/desktop/), you'll find a button that leads you to the "Debian Installation Instructions" which tell you to download a script and execute it. Said script will pull the required GPG key from https://packagecloud.io/shiftkey/desktop/gpgkey and feed it into apt-key. Alternatively, look at https://github.com/shiftkey/desktop/#user-content-debianubuntu-distributions which lists the detailed manual steps.