DU(1)			  BSD General Commands Manual			 DU(1)

NAME
     du -- display disk usage statistics

SYNOPSIS
     du [-A] [-H | -L | -P] [-a | -s | -d depth] [-c] [-l]
	[-h | -k | -m | -B blocksize] [-n] [-x] [-I mask] [file ...]

DESCRIPTION
     The du utility displays the file system block usage for each file argu-
     ment and for each directory in the file hierarchy rooted in each direc-
     tory argument.  If no file is specified, the block usage of the hierarchy
     rooted in the current directory is displayed.

     The options are as follows:

     -A      Display the apparent size instead of the disk usage.  This can be
	     helpful when operating on compressed volumes or sparse files.

     -B blocksize
	     Calculate block counts in blocksize byte blocks.  This is differ-
	     ent from the -k, -m options or setting BLOCKSIZE and gives an
	     estimate of how much space the examined file hierachy would
	     require on a filesystem with the given blocksize.	Unless in -A
	     mode, blocksize is rounded up to the next multiple of 512.

     -H      Symbolic links on the command line are followed, symbolic links
	     in file hierarchies are not followed.

     -L      Symbolic links on the command line and in file hierarchies are
	     followed.

     -I mask
	     Ignore files and directories matching the specified mask.

     -P      No symbolic links are followed.  This is the default.

     -a      Display an entry for each file in a file hierarchy.

     -h      "Human-readable" output.  Use unit suffixes: Byte, Kilobyte,
	     Megabyte, Gigabyte, Terabyte and Petabyte.

     -r      Generate messages about directories that cannot be read, files
	     that cannot be opened, and so on.	This is the default case.
	     This option exists solely for conformance with X/Open Portability
	     Guide Issue 4 (``XPG4'').

     -s      Display an entry for each specified file.	(Equivalent to -d 0)

     -d depth
	     Display an entry for all files and directories depth directories
	     deep.

     -c      Display a grand total.

     -k      Display block counts in 1024-byte (1-Kbyte) blocks.

     -l      If a file has multiple hard links, count its size many times.
	     The default behavior of du is to count files with multiple hard
	     links only once.  When the -l option is specified, the hard link
	     checks are disabled, and these files are counted (and displayed)
	     as many times as they are found.

     -m      Display block counts in 1048576-byte (1-Mbyte) blocks.

     -n      Ignore files and directories with user ``nodump'' flag
	     (UF_NODUMP) set.

     -x      File system mount points are not traversed.

     The du utility counts the storage used by symbolic links and not the
     files they reference unless the -H or -L option is specified.  If either
     the -H or -L options are specified, storage used by any symbolic links
     which are followed is not counted or displayed.

ENVIRONMENT
     BLOCKSIZE	If the environment variable BLOCKSIZE is set, and the -k, -m
		or -h options are not specified, the block counts will be dis-
		played in units of that block size.  If BLOCKSIZE is not set,
		and the -k, -m or -h options are not specified, the block
		counts will be displayed in 512-byte blocks.

SEE ALSO
     df(1), chflags(2), fts(3), symlink(7), quot(8)

HISTORY
     A du command appeared in Version 1 AT&T UNIX.

BSD			       November 6, 2008 			   BSD