If you are facing the problem “gpg returned a non-zer0 error code: 2”, you need to fix it. GPG is an extension of OpenPGP. The main commands in key management are described in this section. To create a new key, type “gpg create” and then specify the fingerprint or keyid. This will create a signing or certification key. You can also specify the fingerprint with the option –passphrase. By default, this action will create a signing key and a certification key. Alternatively, you can specify the fingerprint matching subkeys and set them to expire.
You may encounter this error because the developer of your repository changed the GPG key, and then signed it with the new key. After that, the repository will no longer work for you, because Ubuntu will inform you that the key could not be verified. You can fix this error by adding an unverified key to the repository. The error code will be fixed immediately after you do this. If you still get this message, you need to fix your GPG key.
After you’ve verified that your private key and secret key are correct, run the gpg command. Then, select the ‘edit-key’ option. You can then change your secret key passphrase and user ID. Once you’re done, press the save button to save your keyrings. Lastly, type the quit command to quit the program without updating your keyrings. Alternatively, you can run gpg with the –edit-key command to change the password and keyring. This command is a shortcut to –edit-key. The lsign option uses the fingerprint list and does not apply form checks.
If you’re getting the “gpg returned a non-zer0 error code:2” message, there are several possible causes of this problem. A missing public key, an unsupported algorithm, or an invalid packet can all result in the failure of the signature. To fix the problem, follow these steps. If the problem persists, use a third-party application to verify the signatures.
o Change the home directory. The gpg home option defaults to /.gnupg, which does not make sense in an options file. It overrides the environment variable $GNUPGHOME. After changing the home directory, restart gpg. Your GnuPG will ask you for the user-id. Make sure the key is valid in the file.
o Change the origin of your keys. If you’re using a shared keyring scheme, gpg can track the key’s origin. In most cases, however, this information is implicitly known and should be ignored. However, if you’re using a different keyring scheme, you’ll need to specify this information explicitly. Otherwise, the program won’t be able to verify the signatures properly.