What does ls -R do?

The ls -R command is used in Unix/Linux systems to list the contents of directories recursively. Here's a breakdown of what it does:

Explanation

• ls: This command lists files and directories in the current directory or a specified directory.
• -R: This option stands for "recursive." When used, it tells ls to not only list the contents of the specified directory but also to list the contents of all its subdirectories, going as deep as necessary.

Example Usage

If you have a directory structure like this:

parent_dir/
├── file1.txt
├── sub_dir1/
│   ├── file2.txt
│   └── sub_sub_dir/
│       └── file3.txt
└── sub_dir2/
    └── file4.txt

Running the command:

ls -R parent_dir

Would produce output similar to:

parent_dir:
file1.txt  sub_dir1  sub_dir2

parent_dir/sub_dir1:
file2.txt  sub_sub_dir

parent_dir/sub_dir1/sub_sub_dir:
file3.txt

parent_dir/sub_dir2:
file4.txt

Summary

In summary, ls -R is a powerful command for viewing the entire contents of a directory tree, making it easier to see all files and subdirectories at once.

If you have any more questions or need further clarification, feel free to ask!