http://www.bchemnet.com/suldr/suldr.gpg 404 Not found

[Der Astronaut]

Hello,

I added the repository and the key. If I type sudo apt update I got the error:

W: GPG-Fehler: http://www.bchemnet.com/suldr debian InRelease: Die folgenden Signaturen konnten nicht überprüft werden, weil ihr öffentlicher Schlüssel nicht verfügbar ist: NO_PUBKEY C95104E509BAC46D  NO_PUBKEY FB510D557CC3E840
E: The repository 'http://www.bchemnet.com/suldr debian 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

The German part says that the public key was not found.

Thanks for your help! :)

[bchemnet]

Do this:
1. Remove the repository.
2. sudo apt update
3. Add the repository.
4. sudo apt update
5. Install suldr-keyring.
6. sudo apt update

suldr.gpg is no longer the active key.  This should be a one-time error that is cleared after suldr-keyring is installed.

[Der Astronaut]

Thank for your reply. But Ubuntu doesn't want to at step 4/5 :(

Holen:6 http://www.bchemnet.com/suldr debian InRelease [11,8 kB]                 
Fehl:6 http://www.bchemnet.com/suldr debian InRelease                 
  Die folgenden Signaturen konnten nicht überprüft werden, weil ihr öffentlicher Schlüssel nicht verfügbar ist: NO_PUBKEY C95104E509BAC46D  NO_PUBKEY FB510D557CC3E840
OK:7 http://archive.ubuntu.com/ubuntu xenial-backports InRelease
OK:8 http://archive.ubuntu.com/ubuntu xenial-security InRelease
Paketlisten werden gelesen... Fertig                 
W: GPG-Fehler: http://www.bchemnet.com/suldr debian InRelease: Die folgenden Signaturen konnten nicht überprüft werden, weil ihr öffentlicher Schlüssel nicht verfügbar ist: NO_PUBKEY C95104E509BAC46D  NO_PUBKEY FB510D557CC3E840
E: The repository 'http://www.bchemnet.com/suldr debian 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.

[Der Astronaut]

How do I install the keyring? "sudo apt install suldr-keyring" doesn't work.

[bchemnet]

It seems that Ubuntu has blocked all unathenticated repositories, which means you can't even set up one up to make it authenticated.

To work around, download the keyring package directly:
http://www.bchemnet.com/suldr/pool/debian/extra/su/suldr-keyring_1_all.deb

Then install with sudo dpkg -i suldr-keyring_1_all.deb and refresh apt.  Everything should work then.

[Der Astronaut]

Thank you very much! Now, it works! :)

[Bernhard]

"NO_PUBKEY C95104E509BAC46D  NO_PUBKEY FB510D557CC3E840":

I tried your solution:

Do this:
1. Remove the repository.
2. sudo apt update
3. Add the repository.
4. sudo apt update
5. Install suldr-keyring.
6. sudo apt update

suldr.gpg is no longer the active key.  This should be a one-time error that is cleared after suldr-keyring is installed.

-- But with no success :-(((

 I found an other way to solve the problem:

1. Download the deb-keyring-file "suldr-keyring_1_all.deb".
2. Extract the keyfile "suldr-keyring.gpg" from the downloaded deb-file (it's an archive file) into a folder.
3. If not installed, install "gui-apt-key": sudo apt-get install gui-apt-key
4. Start "gui-apt-key": sudo gui-apt-key
5. Import the extracted keyfile with the started program "gul-apt-key" (import file) from the folder.
6. Renew and check the package list: sudo apt-get update
   (it should work)

Best regards
Bernhard