If you have difficulties with a particular stage in the game, you may find it helpful to review the related chapters in the tutorial series.

如果在游戏的某一阶段中遇到困难，可以回顾这个系列教程中的相关章节，这样对您会有所帮助。

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This tutorial builds on content covered in previous tutorials in this LPI series, so you may want to first review the tutorials for exam 101.

本教程依赖于本lpi考试系列前面的教程介绍的内容，所以您可能需要先参考针对考试101的教程。

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See the tutorial LPI exam 101 prep, Topic 103: GNU and UNIX commands if you need to review here-documents.

关于 here-document 的信息参见教程 “ LPI 101 考试准备，主题 103：GNU 和 UNIX 命令”。

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