du -- summarize disk usage (EXTERNAL) [v1.4]

syntax:  du [pathname]

ex:      du
         du /mydisk
         du .61
         du %

When used without the optional pathname, 'du' prints a table showing
K free and percent used for all online volumes; then totals the K
free and % used and prints the number of volumes online.

If a pathname is given, du prints the name of the volume specified
in the pathname; then it prints the number of free blocks, used
blocks, and total blocks on the volume.

Note that a "K" is 1024 bytes (characters) of storage space, which is
the same as 2 blocks on a ProDOS disk; a block is 512 bytes.