有时需要临时 pull 别人代码执行，但是在 host 环境执行有诸多风险，这时可以用 docker 启动一个沙箱环境：
$ docker run -it -v $(pwd):/app -w /app ruby:2.3 bash
不过这串命令太长了，反复输入几次之后我意识到可以写个 bash function：
# ~/.profile
sandbox() {
docker run -it -v $(pwd):/app -w /app $1 bash
}
这样只要输入 sandbox ruby:2.3 就行了。
Reply to
Rei
Rei
Thanks. This article is important for me. Although I have been heard docker for a long time, it's the first time I use it. I suggest other developers try docker. It will only take you 5 minutes to have a new world. You can get a virtual machine totally no sweat.
Just follow https://store.docker.com/editions/community/docker-ce-desktop-mac and run
$ docker run -it -v $(pwd):/app -w /app ruby:2.3 bash , you will have a ruby2.3 container(like a debian virtual machine, but it will cost you only 19.27 MB's disk space).
