docker安裝（烏班圖）

一、卸載舊版本

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

二、首次安裝，安裝鏡像倉庫

    2.1 更新apt軟件包索引

sudo apt-get update

    2.2 添加docker官方GPG祕鑰

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

    2.3 配置倉庫

vi /etc/apt/sources.list

deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse

三、安裝docker-ce

    3.1 更新版本

sudo apt-get update

    3.2 安裝

        3.2.1 安裝最新版本

sudo apt-get install docker-ce

        3.2.2 安裝指定版本

sudo apt-get install docker-ce=<VERSION>

      》安裝 17.03.2~ce-0~ubuntu-xenial 版本

sudo apt-get install docker-ce=17.03.2~ce-0~ubuntu-xenial

    可能出現的錯誤

    此問題源於libltdl7版本太低，ubuntu16.04默認無更高版本。

    下載：

wget http://launchpadlibrarian.net/236916213/libltdl7_2.4.6-0.1_amd64.deb

     安裝：

sudo dpkg -i libltdl7_2.4.6-0.1_amd64.deb

 再次安裝 =》 跳轉3.1

四、測試安裝

sudo docker run hello-world

就此安裝成功！！！