Imports github.com/docker/machine/log github.com/codegangsta/cli github.com/docker/machine/ssh github.com/docker/machine/drivers github.com/docker/machine/utils github.com/docker/machine/state github.com/docker/machine/drivers/amazonec2/amz Standard library imports crypto/rand errors fmt io io/ioutil net/url path/filepath strconv strings time crypto/md5