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

     du	-- display disk	usage statistics

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

     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 es-
	     timate 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

     -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)

     -t	threshold
	     Display only entries for which size exceeds threshold.  If
	     threshold is negative, display only entries for which size	is
	     less than the absolute value of threshold.

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

     -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)

     -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.

     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.

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

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

BSD			       November	6, 2008				   BSD


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