Displays information on disk usage
du [options] [path-list]
The du (disk usage) utility reports how much disk space is occupied by a directory (along with all its subdirectories and files) or a file. By default du displays the number of 1,024-byte blocks that are occupied by the directory or file.
Without an argument du displays information about the working directory and its subdirectories and files therein. The path-list specifies the directories and files you want information on.
Without any options du displays the total storage used for each argument in path-list. For directories du displays this total only after recursively listing the totals for each subdirectory.
-a Displays the space used by all ordinary ...