要充分利用本系列中的练习，则应该具备Linux系统方面的基本知识，以及一个可正常运行的Linux系统，您可以在该系统上练习本文所涉及的练习。
To get the most from the practice exercises in this series, you should have a basic knowledge of Linux and a working Linux system on which you can practice the exercises covered in this article.
在较早版本的Perl和UNIX以及其它操作系统上也可以使用本文中的示例，但应当将可能的功能故障作为练习来解决。
The examples may work with earlier versions of Perl and UNIX and with and other operating systems, but you should consider their potential failure to function as an exercise to solve.
要从本系列中的练习获得更多的收益，您应当具有Linux系统的基本知识以及一个可正常工作的基于RPM的Linux系统，便于在该系统上实践文中所介绍的练习。
To get the most from exercises in this series, you should have a basic knowledge of Linux and a working RPM-based Linux system on which you can practice the exercises covered in this article.
要从本系列中的练习获得更多的收益，您应当具有Linux系统的基本知识以及一个可正常工作的基于RPM的Linux系统，便于在该系统上实践文中所介绍的练习。
To get the most from exercises in this series, you should have a basic knowledge of Linux and a working RPM-based Linux system on which you can practice the exercises covered in this article.
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