DU(1) BSD Reference Manual DU(1)NAMEdu - display disk usage statistics
SYNOPSISdu [-H | -L | -P] [-a | -s] [-kx] [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 directo-
ry argument. If no file is specified, the block usage of the hierarchy
rooted in the current directory is displayed.
The number of blocks are in the same units as that returned by the
stat(2) system call, i.e. 512-byte blocks. The number of blocks is
rounded up, i.e., partial blocks are counted as complete blocks.
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.
-k Display the number of 1024-byte blocks instead of 512-byte
blocks.
-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 environmental variable BLOCKSIZE is set (and the -k
flag is not specified), the block counts will be displayed in
units of that size block.
SEE ALSOdf(1), fts(3), getbsize(3), symlink(7), quot(8)HISTORY
A du command appeared in Version 6 AT&T UNIX.
BSDI BSD/OS April 1, 1994 1
