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让我们来详细分析一下这个命令的作用:
docker:这是与 Docker 引擎进行交互的命令。
run:这个子命令告诉 Docker 创建并启动一个新容器。
hello-world:这是我们要运行的镜像的名称。
当你运行这个命令时,幕后会发生几件事:
Docker 检查本地是否有 hello-world 镜像。
如果没有,它会自动从 Docker Hub 下载(即“拉取”)该镜像。
Docker 根据这个镜像创建一个新容器。
容器运行,显示一条消息,然后退出。
你应该会看到类似以下的输出:
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://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
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