du Command
  
  
  Purpose
  
  Summarizes disk usage.
  
   Syntax
  
  du [  -k ] [  -l ] [  -r ] [  -s ] [  -a [ File ... ] ] [ 
  Directory ... ]
  
  Description
  
  The du command displays the number of blocks for files and direc-
  tories specified by the File and Directory parameters, and recur-
  sively, for all directories within the specified Directory param-
  eter.  Specifying the  -a flag reports the number of blocks in
  individual files.  The block  count  includes  indirect blocks of
  each  file.  Block count is calculated in 512-byte units indepen-
  dent of the cluster size used by the system.  Specifying the  -k
  flag calculates the block count in 1024-byte units.  If no File
  or Directory parameter is provided, the du command uses the
  current directory.
  
  Notes:
  
  1.	If the  -a flag is not specified, the du command does not re-
  port on any individual files.
  
  2.	If there are too many distinctly linked files, the du command
  counts the excess files more than once.
  
  3.	Block counts are based only on file size; therefore, unallo-
  cated blocks are not accounted for in the reported block counts.
  
  Flags
  
  -a	Displays disk use for each file.
  
  -k	Calculates the block count in 1024-byte units rather than the
  default 512-byte units.
  
  -l	Allocates blocks evenly among the links for files with multi-
  ple  links.  By default, a file with two or more links is counted
  only once.
  
  -r	Reports names of inaccessible files and directories.  If this
  flag  is not specified, inaccessible files or directories are not
  reported.
  
  -s	Displays only the total sum (for each of the specified files
  or directories given).
  
  Exit Status
  
  This command returns the following exit values:
  
  0	Successful completion.
  
  >0	An error occurred.
  
  Examples
  
  1.	To summarize the disk usage of a directory tree and each of
  its subtrees, enter:
  
  du /home/fran
  
  This displays the number of disk blocks in the
  /home/fran directory and each of its subdirectories.
  
  2.	To display the disk usage of each file, enter:
  
  du -a /home/fran
  
  This displays the number of disk blocks contained in each file
  and subdirectory of the /home/fran directory.  The number beside
  a directory is the disk usage of that directory tree.  The number
  beside a regular file is the disk usage of that file alone.
  
  3.	To display only the total disk usage of a directory tree,
  enter:
  
  du -rs /home/fran
  
  The -s flag instructs the du command to display only the sum to-
  tal disk usage of the /home/fran directory and the files it con-
  tains.  The  -r flag tells the du command to display an error
  message if it cannot read a file or directory.
  
  Implementation Specifics
  
  This command is part of Base Operating System (BOS) Runtime.
  
  Files
  
  usr/bin/du	Path to the du command.
  
  Related Information
  
  The  Directory Overview in AIX Version 3.2 System User's Guide:
  Base and Devices explains working with directories and path
  names.
  
  The  Files Overview in AIX Version 3.2 System User's Guide: Base
  and Devices provides information on working with files.
  
  The  df command.