Bring it to the foreground and provide a line of input followed by Ctrl-d to signal end of input file.

将该命令列表放到前台，添加一行输入，最后按下Ctrl - d表示输入文件的结尾。

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Here, whatever the user types until a Control-D (end of file indicator) becomes the command's input.

这里，用户输入Control - d(文件结束指示符)前输入的所有内容都成为command的输入。

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By default, the end-of-file string is an underscore (_); if that character is sent as a single input argument, everything after it is ignored.

缺省情况下，文件结束字符串是下划线(_)；如果将该字符作为单个输入参数来发送，则它之后的所有内容将被忽略。

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