Note that double quotes will work similarly to single quotes, but will still allow bash to do some limited expansion. Therefore, single quotes are your best bet when you are truly interested in passing literal text to a command. For more information on wildcard expansion, type man 7 glob. For more information on quoting in bash, type man 8 glob and read the section titled QUOTING. If you're planning to take the LPI exams, consider this a homework assignment. :)