In linux OS, the apt update command may encounter the following error:
<blockquote>
An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: <a href="https://any/package/address/" class="autolinkedURL autolinkedURL-url" target="_blank">any/package/address</a> stable InRelease: The following signatures could not be verified because the public key is not available: NO_PUBKEY E074D16EB6FF4DE3
</blockquote>
To resolve this issue, in linux terminal, do the following:
<pre><code class="lang-shell">sudo apt-key adv -- keyserver keyserver.ubuntu.com -- recv-keys E074D16EB6FF4DE3
</code></pre>

In linux OS, the **apt update** command may encounter the following error:


> 
An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://any/package/address/ stable InRelease: The following signatures could not be verified because the public key is not available: NO_PUBKEY **E074D16EB6FF4DE3**
 

To resolve this issue, in linux terminal, do the following:

```shell
sudo apt-key adv -- keyserver keyserver.ubuntu.com -- recv-keys E074D16EB6FF4DE3
``` 


Basílio Code

Basílio Code

Solving PPA NO_PUBKEY Error