In Linux and UNIX the ls command lists a directory contents.

Example

Here is what the ls command looks like using MacOS on the wiki

lewis@Lewiss-MacBook-Air obsidian_tech_wiki % ls
Attachments	Drawings	README.md	Wiki		ls.md
Authors		Guidelines.md	Templates	Wiki info

Usage

ls [-@ABCFGHILOPRSTUWabcdefghiklmnopqrstuvwxy1%,] [--color=when]
        [-D format] [file ...]