这是一本实用的指南，并不十分的严肃，尝试用实际的东西来代替那些理论的例子。我分部分来写因为我对那些知道自己在谈论什么人写的脱离实际的和过分单纯的例子并不感到兴奋，展示一些比较酷的bash的特性，-This is a practical guide, not very serious, practical things to try to replace those theoretical example. I am part of those who write because I knew people were talking about writing too much divorced from reality and simple examples are not very excited to display some of the more cool bash features,