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du(1)				  User Commands 			   du(1)

NAME
     du - summarize disk usage

SYNOPSIS
     /usr/bin/du [-adLr] [-k | -h]  [-o | -s]  [file ...]

     /usr/xpg4/bin/du [-a | -s]  [-k | -h]  [-rx] [file ...]

DESCRIPTION
     The  du  utility writes to standard output the size of the file space allo-
     cated to, and the size of the file space allocated to each subdirectory of,
     the file hierarchy rooted in each of the specified files. The size  of  the
     file  space allocated to a file of type directory is defined as the sum to-
     tal of space allocated to all files in the file hierarchy rooted in the di-
     rectory plus the space allocated to the directory itself. This sum will in-
     clude the space allocated to any extended attributes encountered.

     Files with multiple links will be counted and written for only  one  entry.
     The  directory  entry that is selected in the report is unspecified. By de-
     fault, file sizes are written in 512-byte units, rounded  up  to  the  next
     512-byte unit.

   /usr/xpg4/bin/du
     When du cannot obtain file attributes or read directories (see stat(2)), it
     will report an error condition and the final exit status will be affected.

OPTIONS
     The following options are supported for /usr/bin/du and /usr/xpg4/bin/du:

     -a    In  addition  to the default output, report the size of each file not
	   of type directory in the file hierarchy rooted in the specified file.
	   Regardless of the presence of the -a option, non-directories given as
	   file operands will always be listed.

     -h    All sizes are scaled to a human readable format,  for  example,  14K,
	   234M,  2.7G,  or  3.0T.  Scaling  is done by repetitively dividing by
	   1024.

     -k    Write the files sizes in units of 1024 bytes, rather than the default
	   512-byte units.

     -s    Instead of the default output, report only the total sum for each  of
	   the specified files.

   /usr/bin/du
     The following options are supported for /usr/bin/du only:

     -d    Do  not cross filesystem boundaries. For example, du -d / reports us-
	   age only on the root partition.

     -L    Process symbolic links by using the file or directory which the  sym-
	   bolic link references, rather than the link itself.

     -o    Do not add child directories' usage to a parent's total. Without this
	   option,  the  usage	listed	for  a particular directory is the space
	   taken by the files in that directory, as well as the files in all di-
	   rectories beneath it. This option does nothing if -s is used.

     -r    Generate messages about directories that cannot be read,  files  that
	   cannot  be  opened,	and  so forth, rather than being silent (the de-
	   fault).

   /usr/xpg4/bin/du
     The following options are supported for /usr/xpg4/bin/du only:

     -r    By default, generate messages about directories that cannot be  read,
	   files that cannot be opened, and so forth.

     -x    When  evaluating  file sizes, evaluate only those files that have the
	   same device as the file specified by the file operand.

OPERANDS
     The following operand is supported:

     file  The path name of a file whose size is to be written. If  no	file  is
	   specified, the current directory is used.

OUTPUT
     The  output from du consists of the amount of the space allocated to a file
     and the name of the file.

USAGE
     See largefile(5) for the description of the behavior of du when  encounter-
     ing files greater than or equal to 2 Gbyte ( 2**31 bytes).

ENVIRONMENT VARIABLES
     See environ(5) for descriptions of the following environment variables that
     affect the execution of du: LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS
     The following exit values are returned:

     0	   Successful completion.

     >0    An error occurred.

ATTRIBUTES
     See attributes(5) for descriptions of the following attributes:

   /usr/bin/du
     +------------------------------+-----------------------------+
     |	     ATTRIBUTE TYPE	    |	   ATTRIBUTE VALUE	  |
     +------------------------------+-----------------------------+
     | Availability		    |SUNWcsu			  |
     +------------------------------+-----------------------------+
     | CSI			    |enabled			  |
     +------------------------------+-----------------------------+
     | Interface Stability	    |Stable			  |
     +------------------------------+-----------------------------+

   /usr/xpg4/bin/du
     +------------------------------+-----------------------------+
     |	     ATTRIBUTE TYPE	    |	   ATTRIBUTE VALUE	  |
     +------------------------------+-----------------------------+
     | Availability		    |SUNWxcu4			  |
     +------------------------------+-----------------------------+
     | CSI			    |enabled			  |
     +------------------------------+-----------------------------+
     | Interface Stability	    |Standard			  |
     +------------------------------+-----------------------------+

SEE ALSO
     ls(1), stat(2), attributes(5), environ(5), fsattr(5), largefile(5), XPG4(5)

     System Administration Guide: Basic Administration

NOTES
     A	file with two or more links is counted only once. If, however, there are
     links between files in different directories where the directories  are  on
     separate  branches  of  the file system hierarchy, du will count the excess
     files more than once.

     Files containing holes will result in an incorrect block count.

SunOS 5.9			   19 Nov 2001				   du(1)
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