DU(1)

NAME
du - display disk usage statistics

SYNOPSIS
du [-P | -H | -L] [-a | -s | -d depth] [-c] [-k] [-x] [-h] [file ...]

DESCRIPTION
The du utility displays the file system block usage for each file argument and for each directory in the file hierarchy rooted in each directory argument. If no file is specified, the block usage of the hierarchy rooted in the current directory is displayed. If the -k flag is specified, the number of 1024-byte blocks used by the file is displayed, otherwise getbsize(3) is used to determine the preferred block size. Partial numbers of blocks are rounded up.

The options are as follows:

-P  No symbolic links are followed. (default)

-H  Symbolic links on the command line are followed, symbolic links in file hierarchies are not followed.

-L  Symbolic links on the command line and in file hierarchies are followed.

-h  Display sizes in a more human-readable form. If the size is larger than a gigabyte, it displays the size in gigabytes, otherwise if the size is larger than a megabyte the size is displayed in megabytes, otherwise the size is displayed in kilobytes.

-a  Display an entry for each file in a file hierarchy.

-s  Display an entry for each specified file. (Equivalent to -d 0 )

-d depth
    Display an entry for all files and directories depth directories deep.

-c  Display a grand total.

-k  Display block counts in 1024-byte (1-Kbyte) blocks.

-x  Filesystem mount points are not traversed.

Du counts the storage used by symbolic links and not the files they reference unless the -H or -L option is specified. If either the -H or -L options are specified, storage used by any symbolic links which are followed is not counted or displayed.

Files having multiple hard links are counted (and displayed) a single time per du execution.

ENVIRONMENT

BLOCKSIZE
    If the environment variable BLOCKSIZE is set, and the -k option is not specified, the block counts will be displayed in 1024-byte blocks. If BLOCKSIZE is not set, and the -k option is not specified, the block counts will be displayed in 512-byte blocks.

SEE ALSO
df(1), fts(3), symlink(7), quot(8)

HISTORY
A du command appeared in AT&T UNIX.