Ls

From Gentoo Linux Wiki

ls will list the contents of the current directory. ls -l will give details, and ls -a will show hidden files.

[edit] The Natural Reaction to a Blinking Cursor

The Natural Reaction to a Blinking Cursor is to type ls then press enter. This is understandable, but not always appropriate. Try again, but type in something else to search for.

See man page for more