ls
ls [-a] [-l] [folder]
Risk: Safe
What it does
Lists what is in a folder.
When to use it
To see what a room holds before you act.
Example
$ lsList this room.
$ ls -aHidden names (starting with a dot) too.
$ ls -lOne line each: keys, owner, size, date.
Learn it in: Where am I? pwd, cd, ls · Official docs