Question

请问：linux把一个文件夹中的所有的文件夹和文件复制到另外一个文件夹得问题

linux中的命令： cp -r /usr/aa /usr/bb，
运行以后，为什么只能把aa中的一个文件夹复制到bb文件夹中呢，
而不是把所有的文件和文件夹都复制到bb中。
我想要把aa中的所有的文件夹和文件都复制都bb中，
那应该修改成什么样的命令呢？
请大神指点！

Answer 1

You can copy the content of a folder /source to another existing folder /dest with the command
cp -a /source/. /dest/
The -a option is an improved recursive option, that preserve all file attributes, and also preserve symlinks.
The . at end of the source path is a specific cp syntax that allow to copy all files and folders, included hidden ones.

Hence, the answer to your question is that, you should replace "-r" with "-a" in your command.