Натискането на команден ред за вход в системата на docker

$ docker login --username=mydockeruser --password=$mypasswordvariable
Login Succeeded
$ docker push mydockeruser/docker-whale
The push refers to a repository [mydockeruser/docker-whale] (len: 1)
7d9495d03763: Image already exists
c81071adeeb5: Image successfully pushed