What is the difference between the parameters r and R of cp in linux?

Difference: 1. "cp -r" copies both files and folders in the current directory, while "cp -R" only copies files in the current directory and does not copy the current directory. 2. "cp -r" The folder containing files will overwrite the folder with the same name without files, and the files will also be overwritten, while "cp -R" will not overwrite the folder containing the content, but it will overwrite An empty file with the same name; 3. "cp -r" does not use the file suffix name as the basis for identification, but "cp -R" uses the file suffix name as the basis for identification.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is the difference between the parameters r and R of cp in Linux

The difference between the cp -r and -R of the LINUX command is: different copying, different coverage, and different identification basis.

1. Copy different files

• cp -r: cp -r copies the files in the current directory files, and also copies folders in the current directory.

• -R: -R only copies files in the current directory, not folders in the current directory.

2. Cover different

• cp -r: cp -r contains files Folders will overwrite folders with the same name that do not contain files, and files will also be overwritten.

• -R: -R will not overwrite folders with contents, but will overwrite empty files with the same name.

3. Different identification basis

• ##cp -r: cp -r does not The file extension name is used as the basis for identification.

• -R: -R uses the file suffix name as the basis for identification.

Extension:

cp [options] source dest

cp [options] source... directory

• -a: This option is usually used when copying a directory, it Preserve links, file attributes, and copy all contents of the directory. Its effect is equal to the dpR parameter combination.

• -d: Keep the link when copying. The links mentioned here are equivalent to shortcuts in Windows systems.

• -f: Overwrite an existing target file without giving a prompt.

• -i: Contrary to the -f option, a prompt is given before overwriting the target file, asking the user to confirm whether to overwrite. The target file will be overwritten when answering y.

• -p: In addition to copying the contents of the file, the modification time and access permissions are also copied to the new file.

• -r: If the given source file is a directory file, all subdirectories and files in the directory will be copied.

• -l: Do not copy files, just generate link files.

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