DU(1L)DU(1L)NAMEdu - summarize disk usage
SYNOPSISdu [-abcklsxDLS] [--all] [--total] [--count-links] [--summarize]
[--bytes] [--kilobytes] [--one-file-system] [--separate-dirs] [--deref‐
erence] [--dereference-args] [--help] [--version] [filename...]
DESCRIPTION
This manual page documents the GNU version of du. du displays the
amount of disk space used by each argument and for each subdirectory of
directory arguments. The space is measured in 1K blocks by default,
unless the environment variable POSIXLY_CORRECT is set, in which case
512-byte blocks are used.
OPTIONS
-a, --all
Display counts for all files, not just directories.
-b, --bytes
Print sizes in bytes.
-c, --total
Write a grand total of all of the arguments after all arguments
have been processed. This can be used to find out the disk
usage of a directory, with some files excluded.
-k, --kilobytes
Print sizes in kilobytes. This overrides the environment vari‐
able POSIXLY_CORRECT.
-l, --count-links
Count the size of all files, even if they have appeared already
in another hard link.
-s, --summarize
Display only a total for each argument.
-x, --one-file-system
Skip directories that are on different filesystems from the one
that the argument being processed is on.
-D, --dereference-args
Dereference symbolic links that are command line arguments.
Does not affect other symbolic links. This is helpful for find‐
ing out the disk usage of directories like /usr/tmp where they
are symbolic links.
-L, --dereference
Dereference symbolic links (show the disk space used by the file
or directory that the link points to instead of the space used
by the link).
-S, --separate-dirs
Count the size of each directory separately, not including the
sizes of subdirectories.
--help Print a usage message on standard output and exit successfully.
--version
Print version information on standard output then exit success‐
fully.
BUGS
On BSD systems, du reports sizes that are half the correct values for
files that are NFS-mounted from HP-UX systems. On HP-UX systems, it
reports sizes that are twice the correct values for files that are NFS-
mounted from BSD systems. This is due to a flaw in HP-UX; it also
affects the HP-UX du program.
FSF GNU File Utilities DU(1L)