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-hunanchenxingyu translating ....
-================================================================================
-How to Merge Directory Trees in Linux using cp Command
-================================================================================
-How to merge two directory trees with similar layout into a third directory? Let us consider the following example to understand the problem.
-
-Suppose two directories dir1 and dir2 have 3 sub-directories a, b and c in each of them. The directory layout is like below:
-
-![Layout of input directories](http://linoxide.com/wp-content/uploads/2014/07/01.merge_dir_layout.png)
-Layout of input directories
-
-These directories a, b and c have some files in them. The output of tree command will illustrate better:
-
-![Layout of files](http://linoxide.com/wp-content/uploads/2014/07/02.merge_file_layout.png)
-Layout of files
-
-### 1. Using cp to create merge: ###
-
-Now we want to merge these two directories into a third directory, say “merged”.
-The simplest thing that you can do to achieve this is to copy recursively the directories like below:
-
-![Copy directories recursively to create new merge](http://linoxide.com/wp-content/uploads/2014/07/03.merge_cp_recursive.png)
-Copy directories recursively to create new merge
-
-#### 1.1 Problem with cp command and alternative: ####
-
-The problem with this approach is that the files created inside merged directory are copy of original files, and not the original files themselves. But wait, (you might be asking yourself) what is the problem if the files are not original? So to answer your question, consider the situation where you have large number of bulky files. In that case, copying all the files might take hours.
-
-Now let’s get back and try the same with mv command instead of cp.
-
-![Attempt to merge with mv command](http://linoxide.com/wp-content/uploads/2014/07/04.merge_mv_recursive.png)
-Attempt to merge with mv command
-
-The directories are not merged. So we cannot use mv command to merge directories like this.
-Now how can you keep the original files inside “merged” directory?
-
-### 2. The solution: ###
-
-The cp command has a very useful option to draw us out of this situation.
-The -l or --link option to cp aommand creates the hard links instead of copying the files themselves. Let us try with that.
-
-Before trying out the hard link option to cp command, let us print the inode number of the original files.
-The tree command has option to print the inodes with --inodes option:
-
-![Display inodes of original files](http://linoxide.com/wp-content/uploads/2014/07/05.merge_display_inodes.png)
-Display inodes of original files
-
-Now we have the inodes listed here, we can proceed to creating the hard links with --link option to cp command:
-
-![Merge directories with hard links](http://linoxide.com/wp-content/uploads/2014/07/06.merge_create_links.png)
-Merge directories with hard links
-
-#### 2.1 Verify the files: ####
-
-Now the files are copied, let us verify if the inodes match with original files:
-
-![Verify Inodes](http://linoxide.com/wp-content/uploads/2014/07/07.merge_verify_inodes.png)
-Verify Inodes
-
-#### 2.2 Cleanup: ####
-
-As you can see that the files have same inodes as original files. Now the problem is solved and we have the original files inside merged directory. We can now cleanup by removing the directories dir1 and dir2.
-
-![Remove original directories](http://linoxide.com/wp-content/uploads/2014/07/08.merge_cleanup.png)
-Remove original directories
-
---------------------------------------------------------------------------------
-
-via: http://linoxide.com/linux-command/merge-directory-trees-linux/
-
-原文作者：[Raghu][a]
-
-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) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
-
-[a]:http://linoxide.com/author/raghu/
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+在linux中怎样使用cp命令合并目录树
+================================================================================
+怎样将布局相似的两个目录树合并成新的目录树? 为理解该问题让我们思考下面的例子.
+
+假设dir1和dir2目录中分别有3个子目录a,b和c.目录布局如下所示:
+
+![Layout of input directories](http://linoxide.com/wp-content/uploads/2014/07/01.merge_dir_layout.png)
+输入目录布局
+
+在目录a,b和c中有一些文件，tree命令的输出将能更好的说明:
+
+![Layout of files](http://linoxide.com/wp-content/uploads/2014/07/02.merge_file_layout.png)
+文件布局
+
+### 1. 使用cp命令创建合并: ###
+
+现在我们将这两个目录合并成一个新的目录，如"merged".完成上述操作最简单的方式就是递归
+复制目录，如下图所示:
+
+![Copy directories recursively to create new merge](http://linoxide.com/wp-content/uploads/2014/07/03.merge_cp_recursive.png)
+递归复制完成新的合并
+
+#### 1.1 cp命令和替换带来的问题: ####
+
+这种方式所带来的问题是该合并目录中所创建的文件为原文件的副本，并非原文件本身. 别急, (你可能正在问自己) 如果不是原文件又有什么问题? 为了回答你的问题，考虑下你有很多大文件的情况
+.那种情形下，复制所有的文件可能消耗数小时.
+
+现在让我们回到刚那问题上，且尝试使用mv命令而不是cp命令.
+
+![Attempt to merge with mv command](http://linoxide.com/wp-content/uploads/2014/07/04.merge_mv_recursive.png)
+企图使用mv命令进行合并操作
+
+这些目录不能被合并.因此我们不能像这样使用mv命令去合并目录.
+现在你该怎样将原文件保存到"merged"目录中?
+
+### 2. 方法: ###
+
+cp命令有一个非常有用的选项来帮助我们摆脱这种状况.
+cp命令的-l 或 --link选项能够创建硬链接而非原文件副本.让我们尝试一下.
+
+在我们尝试cp命令的硬链接选项前，让我们查看一下原文件的inode号码.
+可通过tree命令--inodes选项来查看inodes:
+
+![Display inodes of original files](http://linoxide.com/wp-content/uploads/2014/07/05.merge_display_inodes.png)
+原文件的inodes
+
+现在我们有了inodes的列表，对于cp命令可通过--link选项创建硬链接:
+
+![Merge directories with hard links](http://linoxide.com/wp-content/uploads/2014/07/06.merge_create_links.png)
+使用硬链接合并的目录
+
+#### 2.1 验证文件: ####
+
+现在文件已经被复制，让我们验证一下inodes是否和原文件匹配:
+
+![Verify Inodes](http://linoxide.com/wp-content/uploads/2014/07/07.merge_verify_inodes.png)
+Verify Inodes
+
+#### 2.2 清除: ####
+
+
+正如你所看到的，这些文件的inodes和原文件的一样.现在 那问题已经被解决，且
+原文件已被复制到合并目录中.现在我们能够移除dir1和dir2目录.
+
+![Remove original directories](http://linoxide.com/wp-content/uploads/2014/07/08.merge_cleanup.png)
+移除原始目录
+
+--------------------------------------------------------------------------------
+
+via: http://linoxide.com/linux-command/merge-directory-trees-linux/
+
+原文作者：[Raghu][a]
+
+译者：[hunanchenxingyu](https://github.com/hunanchenxingyu) 校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
+
+[a]:http://linoxide.com/author/raghu/
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