# 安裝 Docker 我們按如下方式安裝 Docker： 1. 首先，刪除之前安裝的 Docker： ```py $ sudo apt-get remove docker docker-engine docker.io ``` 1. 安裝必備軟件： ```py $ sudo apt-get install \ apt-transport-https \ ca-certificates \ curl \ software-properties-common ``` 1. 添加 Docker 倉庫的 GPG 密鑰： ```py $ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - ``` 1. 添加 Docker 倉庫： ```py $ sudo add-apt-repository \ "deb [arch=amd64] https://download.docker.com/linux/ubuntu \ $(lsb_release -cs) \ stable" ``` 1. 安裝 Docker 社區版： ```py $ sudo apt-get update && sudo apt-get install docker-ce ``` 1. 安裝成功完成后，將 Docker 添加為系統服務： ```py $ sudo systemctl enable docker ``` 1. 要以非 root 用戶身份運行 Docker 或不使用`sudo`，請添加`docker`組： ```py $ sudo groupadd docker ``` 1. 將您的用戶添加到`docker`組： ```py $ sudo usermod -aG docker $USER ``` 1. 現在注銷并再次登錄，以便組成員身份生效。登錄后，運行以下命令來測試 Docker 安裝： ```py $ docker run --name hello-world-container hello-world ``` 您應該看到類似于以下內容的輸出： ```py Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world ca4f61b1923c: Already exists Digest: sha256:be0cd392e45be79ffeffa6b05338b98ebb16c87b255f48e297ec7f98e123905c Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1\. The Docker client contacted the Docker daemon. 2\. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3\. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4\. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://cloud.docker.com/ For more examples and ideas, visit: https://docs.docker.com/engine/userguide/ ``` Docker 已成功安裝。現在讓我們為 TensorFlow 服務構建一個 Docker 鏡像。