用Hello World校验Docker的安装

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用 Docker 运行 Hello World 镜像，命令如下：

# docker run hello-world
Unable to find image ‘hello-world:latest’ locally
latest: Pulling from hello-world
535020c3e8ad: Pull complete
af340544ed62: Pull complete
Digest: sha256:a68868bfe696c00866942e8f5ca39e3e31b79c1e50feaee4ce5e28df2f051d5c
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.
 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 Hub account:
 https://hub.docker.com

For more examples and ideas, visit:
 https://docs.docker.com/userguide/
可见，Docker 注册服务器从 Docker Hub 获取到最新的 Hello World 镜像，下载到了本地。可以再次运行 Hello World 镜像。

# docker run hello-world

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.
 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 Hub account:
 https://hub.docker.com

For more examples and ideas, visit:
 https://docs.docker.com/userguide/
可见，Hello World 镜像运行成功，Docker 的安装也没有问题。

更多 Docker 相关教程见以下内容：

Docker 安装应用(CentOS 6.5_x64) http://www.linuxidc.com/Linux/2014-07/104595.htm 

Ubuntu 14.04 安装 Docker  http://www.linuxidc.com/linux/2014-08/105656.htm 

Ubuntu 使用 VNC 运行基于 Docker 的桌面系统  http://www.linuxidc.com/Linux/2015-08/121170.htm

阿里云 CentOS 6.5 模板上安装 Docker http://www.linuxidc.com/Linux/2014-11/109107.htm 

Ubuntu 15.04 下安装 Docker  http://www.linuxidc.com/Linux/2015-07/120444.htm 

在 Ubuntu Trusty 14.04 (LTS) (64-bit)安装 Docker http://www.linuxidc.com/Linux/2014-10/108184.htm 

在 Ubuntu 15.04 上如何安装 Docker 及基本用法 http://www.linuxidc.com/Linux/2015-09/122885.htm

Docker 的详细介绍：请点这里
Docker 的下载地址：请点这里

本文永久更新链接地址：http://www.linuxidc.com/Linux/2015-09/123294.htm