DU(1) BSD General Commands Manual DU(1)NAMEdu — display disk usage statistics
SYNOPSISdu [-H | -L | -P] [-a | -s | -d depth] [-c] [-h | -k | -m | -g] [-x]
[-I mask] [file ...]
DESCRIPTION
The du utility displays the file system block usage for each file argu‐
ment and for each directory in the file hierarchy rooted in each direc‐
tory argument. If no file is specified, the block usage of the hierarchy
rooted in the current directory is displayed.
The options are as follows:
-a Display an entry for each file in a file hierarchy.
-c Display a grand total.
-d depth
Display an entry for all files and directories depth directories
deep.
-H Symbolic links on the command line are followed, symbolic links
in file hierarchies are not followed.
-h "Human-readable" output. Use unit suffixes: Byte, Kilobyte,
Megabyte, Gigabyte, Terabyte and Petabyte.
-I mask
Ignore files and directories matching the specified mask.
-g Display block counts in 1073741824-byte (1-Gbyte) blocks.
-k Display block counts in 1024-byte (1-Kbyte) blocks.
-L Symbolic links on the command line and in file hierarchies are
followed.
-m Display block counts in 1048576-byte (1-Mbyte) blocks.
-P No symbolic links are followed. This is the default.
-r Generate messages about directories that cannot be read, files
that cannot be opened, and so on. This is the default case.
This option exists solely for conformance with X/Open Portability
Guide Issue 4 (“XPG4”).
-s Display an entry for each specified file. (Equivalent to -d 0)
-x File system mount points are not traversed.
The du utility 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. If more than one of the
-H, -L, and -P options is specified, the last one given is used.
Files having multiple hard links are counted (and displayed) a single
time per du execution. Directories having multiple hard links (typically
Time Machine backups) are counted 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
units of that size block. If BLOCKSIZE is not set, and the -k
option is not specified, the block counts will be displayed in
512-byte blocks.
LEGACY DESCRIPTION
In legacy mode, only one of the -H, -L, or -P options may be specified.
The command will detect and report a SYMLOOP error (loop involving sym‐
bolic links). In legacy mode, this is not the case.
For more information about legacy mode, see compat(5).
SEE ALSOdf(1), fts(3), compat(5), symlink(7), quot(8)HISTORY
A du command appeared in Version 1 AT&T UNIX.
BSD June 2, 2004 BSD
