在前面两篇中，我们讲了大部分参数，今天将介绍另外两个较为重要的参数，然后再将前面两章的知识串起来，做一个DockerFile，实现VIM/SSH镜像。
以下就是今天所要说DockerFile涉及的环境：
、
DockerFile简易示意图：
1、 VOLUME参数：看过我们介绍VOLUME篇的同学应该都知道VOLUME这个参数是用来干啥的，这里就不做多介绍了，如果在dockerfile里不指定的话，可以通过-v进行指定，当然两者是有区别的，具体可以参考Docker篇第五章。
2、 WORKDIR参数：使用该参数可以指定“运行目录”，比如你需要某个命令在/bin/bash下运行，则直接指定WORKDIR /bin/bash即可，该命令最常与RUN搭配使用。
3、 ADD参数：该参数用于复制本地文件或远程文件到构建的镜像中，在创建Container时会复制进去，要使用这个参数需要将相关文件事先拷贝到与dockerfile同一个目录下或者使用URL（可访问的）。
4、 OK,聊了这么多，我们用一个完整的DockerFile文件来举例吧：
5、 完成DockerFile编写，这个DockerFile主要是为了实现能够直接SSH到这个容器并能够使用VIM编辑器，我们用这个dockerfile构建images：
6、 我们利用这个镜像构建一个Container：
7、 直接SSH该Container，成功：
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