Say hello to agedu tool (pronounced as ‘age dee you’) – it scans a directory tree and produces reports about how much disk space is used in each directory and subdirectory, and also how that usage of disk space corresponds to files with last-access times a long time ago. In other words, this command might help you to free up disk space.

via agedu: Unix / Linux Command For Tracking Down Wasted Disk Space.

Can I access agedu reports using terminal mode?
Type the following command (replace /home/wwwroot with actual path):
$ agedu -t /home/wwwroot