DU(1) BSD General Commands Manual DU(1)NAME
du — display disk usage statistics
SYNOPSIS
du [-H | -L | -P] [-a | -d depth | -s] [-cghkmnrx] [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:
-H Symbolic links on the command line are followed. (Symbolic links
encountered in the tree traversal are not followed.)
-L All symbolic links are followed.
-P No symbolic links are followed.
-a Display an entry for each file in the file hierarchy.
-c Display the grand total after all the arguments have been pro‐
cessed.
-d Display an entry files and directories depth directories deep.
-g If the -g flag is specified, the number displayed is the number
of gigabyte (1024*1024*1024 bytes) blocks.
-h If the -h flag is specified, the numbers will be displayed in
"human-readable" format. Use unit suffixes: B (Byte), K (Kilo‐
byte), M (Megabyte), G (Gigabyte), T (Terabyte) and P (Petabyte).
-k By default, du displays the number of blocks as returned by the
stat(2) system call, i.e. 512-byte blocks. If the -k flag is
specified, the number displayed is the number of kilobyte (1024
bytes) blocks. Partial numbers of blocks are rounded up.
-m If the -m flag is specified, the number displayed is the number
of megabyte (1024*1024 bytes) blocks.
-n Ignore files and directories with user "nodump" flag (UF_NODUMP)
set.
-r Generate warning messages about directories that cannot be read.
This is the default behaviour.
-s Display only the grand total for the specified files.
-x Filesystem mount points are not traversed.
du counts the storage used by symbolic links and not the files they ref‐
erence 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 fol‐
lowed is not counted or displayed. The -H, -L and -P options override
each other and the command's actions are determined by the last one spec‐
ified.
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 -g, -h,
-k, and -m options are not specified, the block counts will be
displayed in units of that size block.
SEE ALSOdf(1), chflags(2), fts(3), getbsize(3), symlink(7), quot(8)HISTORY
A du command appeared in Version 6 AT&T UNIX.
BSD September 24, 2006 BSD