The * wildcard

The character * is called a wildcard, and will match against none or more
character(s) in a file (or directory) name. For example, in your unixstuff
directory, type

% ls list*

This will list all files in the current directory starting with list….

Try typing

% ls *list

This will list all files in the current directory ending with ….list
The ? wildcard

The character ? will match exactly one character.
So ?ouse will match files like house and mouse, but not grouse.
Try typing

% ls ?list