Fixing NO_PUBKEY GPG Errors on Ubuntu – The Cleanest Way

While updating my Ubuntu server, I encountered this annoying error: bash NO_PUBKEY [KEY_ID] The following signatures couldn't be verified... After trying a few things, I found a clean and reliable fix that worked without breaking the apt system.

Mar 24, 2025 - 17:40
 0
Fixing NO_PUBKEY GPG Errors on Ubuntu – The Cleanest Way

While updating my Ubuntu server, I encountered this annoying error:


bash
NO_PUBKEY [KEY_ID]
The following signatures couldn't be verified...

After trying a few things, I found a clean and reliable fix that worked without breaking the apt system.