$ date
Fri Mar  6 11:45:18 CST 2015
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty

$ docker -v
Docker version 1.4.1, build 5bc2ff8

$ curl -sSL https://get.docker.com/ubuntu/ | sudo sh

$ docker -v
Docker version 1.5.0, build a8a31ef