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

NAME
     du — display disk usage statistics

SYNOPSIS
     du [-H | -L | -P] [-a | -d depth | -s] [-cghkmnrx] [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:

     -H	     Symbolic links on the command line are followed.  (Symbolic links
	     encountered in the tree traversal are not followed.)

     -L	     All symbolic links are followed.

     -P	     No symbolic links are followed.

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

     -c	     Display the grand total after all the arguments have been pro‐
	     cessed.

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

     -g	     If the -g flag is specified, the number displayed is the number
	     of gigabyte (1024*1024*1024 bytes) blocks.

     -h	     If the -h flag is specified, the numbers will be displayed in
	     "human-readable" format.  Use unit suffixes: B (Byte), K (Kilo‐
	     byte), M (Megabyte), G (Gigabyte), T (Terabyte) and P (Petabyte).

     -k	     By default, du displays the number of blocks as returned by the
	     stat(2) system call, i.e. 512-byte blocks.	 If the -k flag is
	     specified, the number displayed is the number of kilobyte (1024
	     bytes) blocks.  Partial numbers of blocks are rounded up.

     -m	     If the -m flag is specified, the number displayed is the number
	     of megabyte (1024*1024 bytes) blocks.

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

     -r	     Generate warning messages about directories that cannot be read.
	     This is the default behaviour.

     -s	     Display only the grand total for the specified files.

     -x	     Filesystem mount points are not traversed.

     du counts the storage used by symbolic links and not the files they ref‐
     erence 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 fol‐
     lowed is not counted or displayed.	 The -H, -L and -P options override
     each other and the command's actions are determined by the last one spec‐
     ified.

     Files having multiple hard links are counted (and displayed) a single
     time per du execution.

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

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

HISTORY
     A du command appeared in Version 6 AT&T UNIX.

BSD			      September 24, 2006			   BSD
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