Basics: the Commands pwd, ls, cd

$ pwd → print working directory. Show the directory where the user is currently located.
$ ls   → list. List directories and files in a directory.
$ cd   → change directory. Go to another directory.

Examples:

$ pwd
   /home/user1         → The current location within the directory tree.

$ ls
   Desktop bsp.txt → Listing of the content of the current directory.

$ cd Desktop          → Go into the subdirectory Desktop.

$ pwd 
   /home/user1/Desktop

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