Fix for apt "no longer has a release file" error

Fixing the APT “no longer has a release file” error

• Issue: “no longer has a release file” error when running apt update
• Cause: Installed Ubuntu release is no longer supported.
• Quick Fix: This will blank the apt sources file, disabling all custom/non-standard repositories but allowing you to update the OS.

  sudo mv /etc/apt/sources.list ~/
  sudo touch /etc/apt/sources.list
  

• Resolution: Update to the latest Ubuntu/Debian release with sudo do-release-upgrade