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-[#]: collector: (lujun9972)
-[#]: translator: (geekpi)
-[#]: reviewer: ( )
-[#]: publisher: ( )
-[#]: url: ( )
-[#]: subject: (Expand And Unexpand Commands Tutorial With Examples)
-[#]: via: (https://www.ostechnix.com/expand-and-unexpand-commands-tutorial-with-examples/)
-[#]: author: (sk https://www.ostechnix.com/author/sk/)
-
-Expand And Unexpand Commands Tutorial With Examples
-======
-
-![Expand And Unexpand Commands Explained][1]
-
-This guide explains two Linux commands namely **Expand** and **Unexpand** with practical examples. For those wondering, the Expand and Unexpand commands are used to replace TAB characters in files with SPACE characters and vice versa. There is also a command called “Expand” in MS-DOS, which is used to expand a compressed file. But the Linux Expand command simply converts the tabs to spaces. These two commands are part of **GNU coreutils** and written by **David MacKenzie**.
-
-For the demonstration purpose, I will be using a text file named “ostechnix.txt” throughout this guide. All commands given below are tested in Arch Linux.
-
-### Expand command examples
-
-Like I already mentioned, the Expand command replaces TAB characters in a file with SPACE characters.
-
-Now, let us convert tabs to spaces in the ostechnix.txt file and write the result to standard output using command:
-
-```
-$ expand ostechnix.txt
-```
-
-If you don’t want to display the result in standard output, just upload it to another file like below.
-
-```
-$ expand ostechnix.txt>output.txt
-```
-
-We can also convert tabs to spaces, reading from standard input. To do so, just run “expand” command without mentioning the source file name:
-
-```
-$ expand
-```
-
-Just type the text and hit ENTER to convert tabs to spaces. Press **CTRL+C** to quit.
-
-If you do not want to convert tabs after non blanks, use **-i** flag like below.
-
-```
-$ expand -i ostechnix.txt
-```
-
-We can also have tabs a certain number of characters apart, not 8 (the default value):
-
-```
-$ expand -t=5 ostechnix.txt
-```
-
-You can even mention multiple tab positions with comma separated like below.
-
-```
-$ expand -t 5,10,15 ostechnix.txt
-```
-
-Or,
-
-```
-$ expand -t "5 10 15" ostechnix.txt
-```
-
-For more details, refer man pages.
-
-```
-$ man expand
-```
-
-### Unexpand Command Examples
-
-As you may have already guessed, the **Unexpand** command will do the opposite of the Expand command. I.e It will convert SPACE charatcers to TAB characters. Let me show you a few examples to learn how to use Unexpand command.
-
-To convert blanks (spaces, of course) in a file to tabs and write the output to stdout, do:
-
-```
-$ unexpand ostechnix.txt
-```
-
-If you want to write the output in a file instead of just displaying it to stdout, use this command:
-
-```
-$ unexpand ostechnix.txt>output.txt
-```
-
-Convert blanks to tabs, reading from standard output:
-
-```
-$ unexpand
-```
-
-By default, Unexpand command will only convert the initial blanks. If you want to convert all blanks, instead of just initial blanks, use **-a** flag:
-
-```
-$ unexpand -a ostechnix.txt
-```
-
-To convert only leading sequences of blanks (Please note that it overrides **-a** ):
-
-```
-$ unexpand --first-only ostechnix.txt
-```
-
-Have tabs a certain number of characters apart, not **8** (enables **-a** ):
-
-```
-$ unexpand -t 5 ostechnix.txt
-```
-
-Similarly, we can mention multiple tab positions with comma separated like below.
-
-```
-$ unexpand -t 5,10,15 ostechnix.txt
-```
-
-Or,
-
-```
-$ unexpand -t "5 10 15" ostechnix.txt
-```
-
-For more details, refer man pages.
-
-```
-$ man unexpand
-```
-
-* * *
-
-**Suggested read:**
-
-  * [**The Fold Command Tutorial With Examples For Beginners**][2]
-
-
-
-* * *
-
-When you working on large number of files, the Expand and Unexpand commands could be very helpful to replace unwanted TAB characters with SPACE characters and vice versa.
-
---------------------------------------------------------------------------------
-
-via: https://www.ostechnix.com/expand-and-unexpand-commands-tutorial-with-examples/
-
-作者：[sk][a]
-选题：[lujun9972][b]
-译者：[译者ID](https://github.com/译者ID)
-校对：[校对者ID](https://github.com/校对者ID)
-
-本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
-
-[a]: https://www.ostechnix.com/author/sk/
-[b]: https://github.com/lujun9972
-[1]: https://www.ostechnix.com/wp-content/uploads/2019/05/Expand-And-Unexpand-Commands-720x340.png
-[2]: https://www.ostechnix.com/fold-command-tutorial-examples-beginners/
diff --git a/translated/tech/20190610 Expand And Unexpand Commands Tutorial With Examples.md b/translated/tech/20190610 Expand And Unexpand Commands Tutorial With Examples.md
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index 0000000000..3c4f3418c0
--- /dev/null
+++ b/translated/tech/20190610 Expand And Unexpand Commands Tutorial With Examples.md	
@@ -0,0 +1,148 @@
+[#]: collector: (lujun9972)
+[#]: translator: (geekpi)
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (Expand And Unexpand Commands Tutorial With Examples)
+[#]: via: (https://www.ostechnix.com/expand-and-unexpand-commands-tutorial-with-examples/)
+[#]: author: (sk https://www.ostechnix.com/author/sk/)
+
+expand 与 unexpand 命令教程与示例
+======
+
+![Expand And Unexpand Commands Explained][1]
+
+本指南通过实际的例子解释两个 Linux 命令，即 **expand** 和 **unexpand**。对于好奇的人，expand 和 unexpand 命令用于将文件中的 TAB 字符替换为空格，反之亦然。在 MS-DOS 中也有一个名为 “expand” 的命令，它用于解压压缩文件。但 Linux expand 命令只是将 tab 转换为空格。这两个命令是 **GNU coreutils** 的一部分，由 **David MacKenzie** 编写。
+
+为了演示，我将在本文使用名为 “ostechnix.txt” 的文本文件。下面给出的所有命令都在 Arch Linux 中进行测试。
+
+### expand 命令示例
+
+与我之前提到的一样，expand 命令使用空格替换文件中的 TAB 字符。
+
+现在，让我们将ostechnix.txt 中的 tab 转换为空格，并将结果写入标准输出：
+
+```
+$ expand ostechnix.txt
+```
+
+如果你不想在标准输出中显示结果，只需将其写入另一个文件，如下所示。
+
+```
+$ expand ostechnix.txt>output.txt
+```
+
+我们还可以将标准输入中的 tab 转换为空格。为此，只需运行 “expand” 命令而不带文件名：
+
+```
+$ expand
+```
+
+只需输入文本并按回车键就能将 tab 转换为空格。按 **CTRL+C** 退出。
+
+
+如果你不想在非空白符后转换 tab，请使用 **-i** 标记，如下所示。
+
+```
+$ expand -i ostechnix.txt
+```
+
+我们还可以设置每个 tab 为指定数字的宽度，而不是 8（默认值）。
+
+```
+$ expand -t=5 ostechnix.txt
+```
+
+我们甚至可以使用逗号分隔指定多个 tab 位置，如下所示
+
+```
+$ expand -t 5,10,15 ostechnix.txt
+```
+
+或者，
+
+```
+$ expand -t "5 10 15" ostechnix.txt
+```
+
+有关更多详细信息，请参阅手册页。
+
+```
+$ man expand
+```
+
+### unexpand 命令示例
+
+正如你可能已经猜到的那样，**unexpand** 命令将执行与 expand 命令相反的操作。即它会将空格转换为 TAB。让我向你展示一些例子，以了解如何使用 unexpand 命令。
+
+要将文件中的空白（当然是空格）转换为 tab 并将输出写入标准输出，请执行以下操作：
+
+```
+$ unexpand ostechnix.txt
+```
+
+如果要将输出写入文件而不是仅将其显示到标准输出，请使用以下命令：
+
+```
+$ unexpand ostechnix.txt>output.txt
+```
+
+从标准输出读取内容，将空格转换为制表符：
+
+```
+$ unexpand
+```
+
+默认情况下，unexpand 命令仅转换初始的空格。如果你想转换所有空格而不是只是初始空格，请使用 **-a** 标志：
+
+```
+$ unexpand -a ostechnix.txt
+```
+
+仅转换开头的空白（请注意它会覆盖 **-a**）：
+
+```
+$ unexpand --first-only ostechnix.txt
+```
+
+使多少个空格替换成一个 tab，而不是 **8**（启用 **-a** ）：
+
+```
+$ unexpand -t 5 ostechnix.txt
+```
+
+相似地，我们可以使用逗号分隔指定多个tab的位置。
+
+```
+$ unexpand -t 5,10,15 ostechnix.txt
+```
+
+或者，
+
+```
+$ unexpand -t "5 10 15" ostechnix.txt
+```
+
+有关更多详细信息，请参阅手册页。
+
+```
+$ man unexpand
+```
+
+
+在处理大量文件时，expand 和 unexpand 命令对于用空格替换不需要的 TAB 时非常有用，反之亦然。
+
+--------------------------------------------------------------------------------
+
+via: https://www.ostechnix.com/expand-and-unexpand-commands-tutorial-with-examples/
+
+作者：[sk][a]
+选题：[lujun9972][b]
+译者：[geekpi](https://github.com/geekpi)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.ostechnix.com/author/sk/
+[b]: https://github.com/lujun9972
+[1]: https://www.ostechnix.com/wp-content/uploads/2019/05/Expand-And-Unexpand-Commands-720x340.png
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