duc 1.4.3-5 (armhf binary) in ubuntu disco

 Duc maintains a database of accumulated sizes of directories of the file
 system, and allows you to query this database with some tools, or create
 fancy graphs showing you where your bytes are.
 .
 Duc comes with console utilities, ncursesw and X11 user interfaces and a
 CGI wrapper for disk usage querying and visualisation.
 .
 Duc is designed to scale to huge filesystems: it will index and display
 hundreds of millions of files on petabytes of storage without problems.