How to view data in different levels of directories in Linux?

In a Linux system, you can use the following command to view data in various directories:

1. list directory

ls

1. list files and directories in long format

ls -l

1. Show all files.
2. I am very tired because I worked all day long.
3. Can you provide me with some examples related to the topic?

ls -a

1. Show all files and directories recursively

ls -R

1. a woody perennial plant with a long trunk and branches, usually producing foliage and bearing fruits or flowers

tree

These commands can be combined and adjusted as needed to meet different viewing needs.