du(1) User Commands du(1)NAMEdu - 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 speci‐
fied 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 divid‐
ing 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
symbolic 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 deter‐
mines 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 encoun‐
tering 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_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 │SUNWcs │
├─────────────────────────────┼─────────────────────────────┤
│CSI │Enabled │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
└─────────────────────────────┴─────────────────────────────┘
/usr/xpg4/bin/du
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWxcu4 │
├─────────────────────────────┼─────────────────────────────┤
│CSI │Enabled │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Standard │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOls(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 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 5.11 6 Feb 2007 du(1)
