自己创建Image会有一些好处，可以选择最新的版本，而且从国内的镜像创建时更新软件也会从该镜像获取，速度更快。
（1）安装debootstrap
zhouh1@uhome:/media/zhouh1/databak/docker$ sudo apt-get install debootstrap Reading package lists... Done 。。。。。。。
以下为关于这个包的介绍
Description: Bootstrap a basic Debian system debootstrap is used to create a Debian base system from scratch, without requiring the availability of dpkg or apt. It does this by downloading .deb files from a mirror site, and carefully unpacking them into a directory which can eventually be chrooted into.
（2）创建基础系统
zhouh1@uhome:/mnt/data/docker$ sudo debootstrap trusty trusty http://mirrors.163.com/ubuntu/ I: Retrieving Release I: Retrieving Release.gpg I: Checking Release signature I: Valid Release signature (key id 790BC7277767219C42C86F933B4FE6ACC0B21F32) I: Retrieving Packages 。。。。。。。。。。 。。。。。。。。。。 I: Configuring rsyslog... I: Configuring kbd... I: Configuring ubuntu-minimal... I: Configuring libc-bin... I: Configuring initramfs-tools... I: Base system installed successfully
（3）导入到docker
zhouh1@uhome:/mnt/data/docker/trusty$ sudo tar -c . | sudo docker import - trusty b769d49299800c7984036f3afdd73aa8f0f8f8d6bd8dd0c45c267ecabd04cb08
（4）测试
zhouh1@uhome:/mnt/data/docker/trusty$ sudo docker run -i -t trusty /bin/bash root@2d66c560066c:/# test root@2d66c560066c:/# echo root@2d66c560066c:/# exit