Verify connectivity by running ping hub.docker.com or curl -v https://registry-1.docker.io/v2/ .
Docker may fail to resolve the registry hostname (e.g., registry-1.docker.io ), often because of a faulty local DNS stub resolver. docker download failed after attempts=6
Corruption in the local Docker cache or a stuck daemon process can trigger persistent failures. Problem/ problem pulling images - Docker Community Forums Verify connectivity by running ping hub
Edit /etc/resolv.conf and replace the local nameserver with public ones like Google’s: nameserver 8.8.8.8 nameserver 8.8.4.4 Use code with caution. 2. Configure Docker Proxy Settings docker download failed after attempts=6
Unstable connections, corporate firewalls, or VPNs can cause "unexpected EOF" (End of File) or connection timeouts.
On systems like Ubuntu, the default local resolver can sometimes interfere with Docker.