安裝

Docker安裝相當容易，只要到官方網站上下載即可

檢查版號

安裝完成第一件事就是來檢查版號

1. 輸入docker --version檢查版號

$ docker --version
Docker version 19.03.2, build 6a30dfc

2. 輸入docker info取得詳細資訊

$ docker info

Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: 17.12.0-ce
Storage Driver: overlay2
...

Docker測試

1. 運行簡單的映像檔(Image)

$ docker run hello-world

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
Digest: sha256:ca0eeb6fb05351dfc8759c20733c91def84cb8007aa89a5bf606bc8b315b9fc7
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.
...

2. 列出現有的映像檔

$ docker image ls

3. 列出容器(Container)

$ docker container ls --all

CONTAINER ID     IMAGE           COMMAND      CREATED          STATUS
54f4984ed6a8     hello-world     "/hello"     20 seconds ago   Exited (0) 19 seconds ago

Docker指令

## List Docker CLI commands
docker
docker container --help

## Display Docker version and info
docker --version
docker version
docker info

## Execute Docker image
docker run hello-world

## List Docker images
docker image ls

## List Docker containers (running, all, all in quiet mode)
docker container ls
docker container ls --all
docker container ls -aq