By default, the disk usage command displays the total bytes used by a file. A more human-readable format is expressed in units such as KB, MB, or GB. The -h option displays the results in a human-readable format:

    du -h FILENAME

Consider this example:

    $ du -h test/pcpu.sh
    4.0K  test/pcpu.sh
    # Multiple file arguments are accepted

Alternatively, use it like this:

    # du -h DIRECTORY
    $ du -h hack/
    16K  hack/