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 allocated 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
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 unspecified. 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 pres-
ence 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 usage only on the root partition.
-L Process symbolic links by using the file or directory
which the symbolic 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 direc-
tories 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 default).
/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 allo-
cated 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_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 attri-
butes:
/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), large-
file(5), standards(5)
System Administration Guide: Basic Administration
NOTES
A file with two or more links is counted only once. If, how-
ever, 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.
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