Cmd represents an external command being prepared or run. A Cmd cannot be reused after calling its Run, Output or CombinedOutput methods.

Docker contains connection to Docker API. Use github.com/fsouza/go-dockerclient to initialize *docker.Client.

Execution determines how the command is going to be executed. Currently the only method is ByCreatingContainer.

ExitError reports an unsuccessful exit by a command.

cmd ensures interface compatibility between os/exec.Cmd and dexec.Cmd.