http://www.macnn.com/articles/01/03/05/df.and/
DF and DU - tips
updated 09:51 am EST, Mon March 5, 2001
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Michael Coyle at ResExcellence has added two "terminal tips" today that tell the user what 'df' and 'du' can be used for and how to use them. "Because MacOS X hides so many directories from the user, command line utilities like df and du can provide you with a much better idea of hard disk usage. To find out more options for both programs, type man df and man du from the command line."
