一键脚本安装：

$ sudo wget -qO- https://get.docker.com/ | bash

$ # 如果上面的不行，执行下面两句
$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

$ # 安装成功执行下面语句，如果有类似回显，说明安装成功
$ docker --version
Docker version 18.06.1-ce, build e68fc7a

ubuntu系统（均为64位操作系统）版本要求：

Bionic 18.04 (LTS)
Artful 17.10
Xenial 16.04 (LTS)
Trusty 14.04 (LTS)

更改系统软件源为国内阿里云源

1）、备份系统内置sources.list文件

sudo mv /etc/apt/sources.list /etc/apt/sources.list.back

2）、使用vim增加新的sources.list文件

sudo vim /etc/apt/sources.list

按a、i、o三者任意一个按键进入编辑模式插入以下代码

deb-src http://archive.ubuntu.com/ubuntu bionic main restricted #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ bionic universe
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates universe
deb http://mirrors.aliyun.com/ubuntu/ bionic multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse #Added by software-properties
deb http://archive.canonical.com/ubuntu bionic partner
deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ bionic-security universe
deb http://mirrors.aliyun.com/ubuntu/ bionic-security multiverse

按esc键（进入命令模式）
:wq (保存并退出)

3）更新系统apt包索引

sudo apt-get update

安装docker

1、删除老版本docker

sudo apt-get remove docker docker-engine docker.io

2、删除老版本docker数据目录

sudo rm -rf /var/lib/docker/

3、安装https相关工具，让安装包允许apt通过HTTPS使用软件仓库

sudo apt-get -y install \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common

4、添加Docker的官方GPG密钥：

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

5、配置docker稳定版仓库地址

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

6、再次更新apt包索引

sudo apt-get update

7、安装docker-ce

sudo apt-get install -y docker-ce

8、验证docker是否安装成功

sudo docker run hello-world

以下操作为非root用户操作，root用户不用操作

9、将当前帐号添加到docker用户组
sudo usermod -aG docker $USER

10、重启docker服务
sudo service docker restart

11、切换group
newgrp - docker

12、脚本一键安装方式
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh
sudo usermod -aG docker $USER

安装docker-compose

1.安装docker-compose
sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose

2.给docker-compose添加可执行权限
sudo chmod +x /usr/local/bin/docker-compose

3.检验
docker-compose --version