首先得去https://www.docker.com/  官網註冊一個賬號

1.上傳映象

[[email protected] docker]# docker tag test:latest dy1999/test:latest

[[email protected] docker]# docker login  輸入剛才註冊的使用者名稱和密碼

Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.

Username: dy1999

Password: 

Login Succeeded

[[email protected] docker]# docker push dy1999/test:latest   其中dy1999為我剛註冊的使用者名稱  test為docker網站上的倉庫名 沒有會自動建立  latest為標籤

The push refers to a repository [docker.io/dy1999/test]

a473a4bafa40: Pushed 

a8de0e025d94: Pushed 

a5e66470b281: Pushed 

ac7299292f8b: Pushed 

e1a9a6284d0d: Pushed 

fccbfa2912f0: Pushed 

latest: digest: sha256:3545bfcb3fd004ce0c3489a5f10dbbf92187ea2cb89c0aaf6e5c3946981b263f size: 1564

2.存出

cd  /var/opt/docker   上傳檔案 ubuntu-14.04-x86_64-minimal.tar.gz

[[email protected] docker]# sudo cat ubuntu-14.04-x86_64-minimal.tar.gz |docker import - ubuntu:14.04

會輸出sha256:cd7ac3dace3edc17b80b933a2c43976be0068c83fb749d8fc7a559a04f43dcdf

[[email protected] docker]# docker images

REPOSITORY                 TAG                 IMAGE ID            CREATED              SIZE

ubuntu                     14.04               cd7ac3dace3e        About a minute ago   215 MB

test                       latest              131466eb2ab0        23 minutes ago       113 MB

docker.io/ubuntu           latest              c9d990395902        4 days ago           113 MB

docker.io/centos           latest              e934aafc2206        10 days ago          199 MB

docker.io/learn/tutorial   latest              a7876479f1aa        5 years ago          128 MB

存出本地的映象為檔案ubuntu_14.04.tar

[[email protected] docker]# docker save -o ubuntu_14.04.tar  ubuntu:14.04  

會 在/var/opt/docker 建立ubuntu_14.04.tar檔案

3.存入

docker load --input ubuntu_14.04.tar 載入映象

或者docker load < ubuntu_14.04.tar

[[email protected] docker]# docker load < ubuntu_14.04.tar

輸出Loaded image: ubuntu:14.04