Public key not available when updating

now05ster

now05ster

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Total Linux noob here.

Can anyone help me with the below issue when running apt-get update on Buster as I keep on getting public key not available. From what I've Google'd it seems to be related to some security change implemented etc. (?) It was a few weeks ago and I honestly cant even remember where I got lost.

Is there a quick fix to this? It doesn't have to be a secure solution such as importing the keys or whatever. If there is an easy way to bypass the security check in the sources.list file (or wherever) then that will do fine.

Here is the output when running apt-get update.


Code: 
Get:1 http://security.debian.org/debian-security bullseye-security InRelease [48.4 kB]
Err:1 http://security.debian.org/debian-security bullseye-security InRelease   
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 112695A0E562B32A NO_PUBKEY 54404762BBB6E853
Get:2 http://deb.debian.org/debian bullseye InRelease [116 kB]                 
Hit:3 http://archive.raspberrypi.org/debian bullseye InRelease                 
Err:2 http://deb.debian.org/debian bullseye InRelease     
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9 NO_PUBKEY 605C66F00D6C9793
Get:4 http://deb.debian.org/debian bullseye-updates InRelease [44.1 kB]
Get:5 http://deb.debian.org/debian bullseye-backports InRelease [49.0 kB]
Err:4 http://deb.debian.org/debian bullseye-updates InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9
Err:5 http://deb.debian.org/debian bullseye-backports InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9
Reading package lists... Done
W: GPG error: http://security.debian.org/debian-security bullseye-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 112695A0E562B32A NO_PUBKEY 54404762BBB6E853
E: The repository 'http://security.debian.org/debian-security bullseye-security InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://deb.debian.org/debian bullseye InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9 NO_PUBKEY 605C66F00D6C9793
E: The repository 'http://deb.debian.org/debian bullseye InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://deb.debian.org/debian bullseye-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9
E: The repository 'http://deb.debian.org/debian bullseye-updates InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://deb.debian.org/debian bullseye-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9
E: The repository 'http://deb.debian.org/debian bullseye-backports InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

here is my sources.list file at present.


Code: 
deb http://deb.debian.org/debian bullseye main
deb-src http://deb.debian.org/debian bullseye main

deb http://security.debian.org/debian-security bullseye-security main
deb-src http://security.debian.org/debian-security bullseye-security main

deb http://deb.debian.org/debian bullseye-updates main
deb-src http://deb.debian.org/debian bullseye-updates main

deb http://deb.debian.org/debian bullseye-backports main
deb-src http://deb.debian.org/debian bullseye-backports main
 
Keys are missing. The solution

Code: 
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys THE_MISSING_KEY_HERE

Batch import solution as I see multiple keys are missing.

Code: 
sudo apt update 2>&1 1>/dev/null | sed -ne 's/.<em>NO_PUBKEY //p' | while read key; do if ! [[ ${keys[</em>]} =~ "$key" ]]; then sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys "$key"; keys+=("$key"); fi; done
 
DWPTA said:
Keys are missing. The solution
Code: 
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys THE_MISSING_KEY_HERE
Batch import solution as I see multiple keys are missing.
Code: 
sudo apt update 2>&1 1>/dev/null | sed -ne 's/.NO_PUBKEY //p' | while read key; do if ! [[ ${keys[]} =~ "$key" ]]; then sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys "$key"; keys+=("$key"); fi; done
Click to expand...

Many thanks for the response, somehow I missed the reply notification. Having a crack at it now, will do as suggested.
 
Sometimes the usual fixes just don't work and you need to remove and re-import the third party download source from scratch.
 
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