Software⏱️ 2 min read📅 2026-05-31

How to Fix: GPG error: The following signatures couldn't be verified because the public key is not available

GPG error fix for apt-get update

Quick Answer: Update the package index and add the missing public key using `sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3C962022012520A0`

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. ✅ Best Solutions to Fix It
  3. 💡 Conclusion

The GPG error you're encountering occurs when the public key associated with a repository's signature cannot be verified. This is often due to the fact that the public key is not available or has expired.

💡 Why You Are Getting This Error

  • [Cause]

✅ Best Solutions to Fix It

Method 1: Update GPG Keys

  1. Step 1: Run the command sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3C962022012520A0 to update your GPG keys.

Method 2: Add Repository

  1. Step 1: Run the command sudo add-apt-repository --keyserver keyserver.ubuntu.com ppa:hivemind/ppa to add the repository.

💡 Conclusion

By following these methods, you should be able to resolve the GPG error and successfully update your system's package list.

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