du(1)								   User Commands							     du(1)

NAME

       du - summarize disk usage

SYNOPSIS

       /usr/bin/du [-dorx] [-a | -s] [-h | -k | -m] [-H | -L]
	    [file ...]

       /usr/xpg4/bin/du [-dorx] [-a | -s] [-h | -k | -m] [-H | -L]
	    [file ...]

DESCRIPTION

       The  du	utility writes to standard output the size of the file space allocated to, and the size of the file space allocated to each subdi-
       rectory 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  total  of space allocated to all files in the file hierarchy rooted in the directory plus the space allocated to the
       directory itself. This sum will include 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  unspeci-
       fied. By default, 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.

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

       -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.

       -H    If a symbolic link to a directory is specified on the command line, process the symbolic link by using the directory which  the  sym-
	     bolic link references, rather than the link itself.

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

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

       -m    Write the files sizes in units of megabytes, rather than the default 512-byte units.

       -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 directories beneath it. This option does  nothing	if  -s	is
	     used.

       -r    Generate  diagnostic  messages about unreadable directories and files whose status cannot be obtained. /usr/bin/du is silent if these
	     conditions arise and -r is not specified. /usr/xpg4/bin/du acts as though -r is always specified.

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

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

       Specifying more than one of the options in the mutually exclusive pair, -H and -L, is not considered an error. The  last  option  specified
       determines the output format.

       Specifying  more  than  one  of	the  options in the mutually exclusive set of options -h, -k, and -m is not considered an error.  The last
       option specified determines the output format.

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 encountering 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:	LANG,  LC_ALL,	LC_CTYPE,  LC_MES-
       SAGES, 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), standards(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 directo-
       ries 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 5.11							    6 Feb 2007								     du(1)