-du [-s] [-h] <path>: Show the amount of space, in bytes, used by the files that
match the specified file pattern. The following flags are optional:
-s Rather than showing the size of each individual file that
matches the pattern, shows the total (summary) size.
-h Formats the sizes of files in a human-readable fashion
rather than a number of bytes.
Note that, even without the -s option, this only shows size summaries
one level deep into a directory.
The output is in the form
size name(full path)