This article illustrates how to write a Linux command-line utility, similar to standard commands such as cat, ls, pr, mv, and so on.

本文演示如何编写与cat、ls、pr 和mv等标准命令类似的Linux命令行实用程序。

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FMT formats the text into neat paragraphs and outputs it to standard output, which is piped into the standard input of pr.

fmt命令将文本内容格式化之后，将结果输送到标准输出，通过管道机制，作为pr命令的标准输入，pr命令将接收到的标准输入进行处理——内容分页。

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Therefore, while most enterprises have an immature understanding of pr, they tend to take price as the standard to select pr firms or regard pr as a tool of increasing their exposure rate.

在企业对于公关认知尚未成熟的情况之下，往往以价格作为选择公关公司的标准，或仅将公关视为增加企业曝光率的工具。

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Therefore, while most enterprises have an immature understanding of pr, they tend to take price as the standard to select pr firms or regard pr as a tool of increasing their exposure rate.

在企业对于公关认知尚未成熟的情况之下，往往以价格作为选择公关公司的标准，或仅将公关视为增加企业曝光率的工具。

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