Content-type: text/html Man page of du

du

Section: User Commands (1)
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NAME

du - Displays a summary of disk usage  

SYNOPSIS

du [-a|-s] [-klrx] [directory...]


 

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

du:  XPG4, XPG4-UNIX

Refer to the standards(5) reference page for more information about industry standards and associated tags.
 

OPTIONS

Displays disk use for each file. Without -a, du does not report on files unless directory explicitly names a file. Displays only the grand total for each of the specified directories, or for a file if used with -a. Displays block count in kilobytes (1024 bytes) instead of multiples of 512 bytes. [Compaq]  Allocates blocks, in files with multiple links, evenly among the links. By default, a file with two or more links is counted only once. Displays an error message when du encounters an inaccessible directory, or an inaccessible file when used with -a. Displays information about only the specified file system. For example, if you want to display information about only the root file system, specify both the -x option and the root file system (/).
 

OPERANDS

The path name of a directory to be examined. All subdirectories of directory are examined.

If directory evaluates to a file name, then only information about the file is provided.
 

DESCRIPTION

The du command gives the number of blocks in all directories (listed recursively) within each specified directory.

[Compaq]  When the -a option is specified, du reports the number of blocks in individual files. The block count includes the indirect blocks of each file and is in 512-byte units, independent of the cluster size used by the system. If no file or directory name is provided, the du command uses the current directory.
 

NOTES

If too many files are distinctly linked, du counts the excess files more than once.
 

EXIT STATUS

The following exit values are returned: Successful completion. An error occurred.
 

EXAMPLES

To display the disk usage of a directory tree and each of its subtrees, enter: du /u/fran

The previous command displays the number of disk blocks in the /u/fran directory and each of its subdirectories. To display the disk usage of each file, enter: du -a /u/fran
The previous command displays the number of disk blocks contained in each file and subdirectory of /u/fran. The number beside a directory is the disk usage of that directory tree. The number beside a regular file is the disk usage of that file alone. To display only the total disk usage of a directory tree, enter: du -rs /u/fran
The previous command displays only the sum total disk usage of /u/fran and the files it contains (-s). The -r option tells du to display an error message if it cannot read a file or directory. To restrict the disk usage information to the root (/) file system, enter: du -x /
The previous command displays information only about the root file system and does not display information about the file systems located under the root file system.
 

ENVIRONMENT VARIABLES

The following environment variables affect the execution of du: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization variables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the format and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES.
 

SEE ALSO

Commands:  df(1), ls(1), quot(8)

Functions:  lseek(2), stat(2)

Routines:  fseek(3)

Standards:  standards(5)


 

Index

NAME
SYNOPSIS
STANDARDS
OPTIONS
OPERANDS
DESCRIPTION
NOTES
EXIT STATUS
EXAMPLES
ENVIRONMENT VARIABLES
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 02:42:57 GMT, October 02, 2010