on-line tutorial text 联机教导文字
Pages in the body of the tutorial feature the text and illustrations of each panel, separated on the page with a horizontal line.
教程主体中的页面中包含了每个面板的文本及其说明，它们之间用一条水平线分隔。
To complete the examples in this tutorial, you should have a general familiarity with UNIX command-line shells and text editors.
为了完成本教程中的示例，您应该基本熟悉unix命令行shell和文本编辑器。
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