1. 先對系統進行更新

　　1.1 apt-get upgrade

　　1.2 去中國關於dockers的網站

　　　http://get.daocloud.io/

　　1.3 安裝docker

curl -sSL https://get.daocloud.io/docker | sh

　　1.4 如果你的電腦沒有安裝curl，執行：sudo apt install curl

　　1.5 若報錯說

2 安裝docker（ubuntu 16.04）

Prerequisites

To follow this tutorial, you will need the following:

• 64-bit Ubuntu 16.04 server
• Non-root user with sudo privileges Initial Setup Guide for Ubuntu 16.04 explains how to set this up.)

Note: Docker requires a 64-bit version of Ubuntu as well as a kernel version equal to or greater than 3.10. The default 64-bit Ubuntu 16.04 server meets these requirements.

All the commands in this tutorial should be run as a non-root user. If root access is required for the command, it will be preceded by sudo

Step 1 — Installing Docker

The Docker installation package available in the official Ubuntu 16.04 repository may not be the latest version. To get the latest and greatest version, install Docker from the official Docker repository. This section shows you how to do just that.

First, add the GPG key for the official Docker repository to the system:

• curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Add the Docker repository to APT sources:

• sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

Next, update the package database with the Docker packages from the newly added repo:

• sudo apt-get update

Make sure you are about to install from the Docker repo instead of the default Ubuntu 16.04 repo:

• apt-cache policy docker-ce

You should see output similar to the follow:

docker-ce:
  Installed: (none)
  Candidate: 17.03.1~ce-0~ubuntu-xenial
  Version table:
     17.03.1~ce-0~ubuntu-xenial 500
        500 https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages
     17.03.0~ce-0~ubuntu-xenial 500
        500 https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages

Notice that docker-ce is not installed, but the candidate for installation is from the Docker repository for Ubuntu 16.04. The docker-ce version number might be different.

Finally, install Docker:

• sudo apt-get install -y docker-ce
• 註意：有可能運行因為docker是高版本出錯
• 因為使用docker-er比install docker.io下載的版本高，後者屬於老版本安裝
• 

• 

Docker should now be installed, the daemon started, and the process enabled to start on boot. Check that it‘s running:

• sudo systemctl status docker

The output should be similar to the following, showing that the service is active and running:

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2016-05-01 06:53:52 CDT; 1 weeks 3 days ago
     Docs: https://docs.docker.com
 Main PID: 749 (docker)

Installing Docker now gives you not just the Docker service (daemon) but also the docker command line utility, or the Docker client. We‘ll explore how to use the docker command later in this tutorial.

3. 加速：

　　　　http://guide.daocloud.io/dcs/docker-9153151.html

　　　　https://www.daocloud.io/mirror#accelerator-doc

教程主要來源：https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04

　　　　　　　　https://docs.docker.com/install/linux/docker-ce/ubuntu/#os-requirements

ubuntu安裝dockers過程：