NAME
du —
display disk usage
statistics
SYNOPSIS
du |
[-H | -L |
-P] [-a |
-s] [-x]
[file ...] |
DESCRIPTION
Thedu 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. The number of blocks are in the
same units as that returned by the
stat(2) system call, i.e. 512-byte blocks. Partial numbers of blocks
are rounded up.
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.
-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 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. The -H,
-L and -P options override
each other and the command's actions are determined by the last one
specified.
Files having multiple hard links are counted (and displayed) a
single time per du execution.
ENVIRONMENTAL VARIABLES
BLOCKSIZE- If the environmental variable
BLOCKSIZEis set, the block counts will be displayed in units of that size block.
SEE ALSO
HISTORY
A du command appeared in
Version 6 AT&T UNIX.