Best Fixes
Verify that the Docker daemon or Docker Desktop is actually running.
Check socket permissions, context configuration, and whether the client is pointing at the correct host.
Why Docker CLI commands fail when the daemon is unavailable and what to check first.
This error means the Docker client cannot reach the daemon socket or service it depends on. The cause is often that Docker is not running, the socket path is wrong, or the current user lacks access.
Verify that the Docker daemon or Docker Desktop is actually running.
Check socket permissions, context configuration, and whether the client is pointing at the correct host.
Do not assume sudo is the correct fix before confirming how Docker is supposed to be configured on that machine.
Do not debug container config before verifying the daemon itself is reachable.