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 ...]