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+agedu (time-sensitive 'du' utility)
+
+agedu is a utility for tracking down wasted disk space. It does the
+same sort of disk scan as du, but it also records the last-access times
+of everything it scans. Then it builds an index that lets it
+efficiently generate reports giving a summary of the results for each
+subdirectory, and then it produces those reports on demand.