说明：  Unix/Linux脚本编程: perl部分Perl 的设计目标是帮助 UNIX 用户完成一些常见的任务，这些任务对于 Shell 来说过于沉重或对移植性要求过于严格。Perl 语言中包含了 C、C++、shell,script、sed、awk 这几个语言的语法,它最初的目的就是用来取代 UNIX 中 sed/awk 与 脚本语言的组合,用来汇整信息，产生报表。因此 Perl 语言要远远比前面讲的 BASH 复杂和功能强大
(Unix/Linux scripting: perl Perl part of the design goal is to help UNIX users through some common tasks that are too heavy for Shell or transplanted is too strict. Perl language includes C, C++, shell, script, sed, awk syntax of these languages, its original purpose is to replace UNIX in sed/awk scripting language combinations and used to compile information, generate reports . So far more than Perl language spoken in front of the complex and powerful BASH)