1、更改apt源，更改前先对sources.list文件进行备分
ccskun@test:~$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
修改sources.list文件：
sudo gedit /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-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
更新apt源：
ccskun@test:~$ sudo apt-get update
2、安装Docker
ccskun@test:~$ sudo apt-get install docker.io
安装完成后，需要重启下系统。
sudo reboot
3、验证
ccskun@test:~$ sudo docker info
Containers: 0
Images: 0
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 0
Dirperm1 Supported: true
Execution Driver: native-0.2
Kernel Version: 4.4.0-22-generic
Operating System: Ubuntu 16.04 LTS (containerized)
CPUs: 4
Total Memory: 3.842 GiB
Name: test
ID: H6MK:VMBX:ARD3:R4GN:VMVW:WHPW:AM35:JYVZ:QVYV:2L4M:AWCQ:QOPJ
WARNING: No swap limit support
ccskun@test:~$