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- NAME
-
- du
- - summarize disk usage
- SYNOPSIS
-
du [-abcklsxDLS] [-all] [-total] [-count-links]
[-summarize] [-bytes] [-kilobytes] [-one-file-system]
[-separate-dirs] [-dereference] [-dereference-args]
[-help] [-version] [file- name...]
- DESCRIPTION
-
This documentation is no longer being maintained and may be inaccurate
or incomplete. The Texinfo documentation is now the authoritative
source. 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
variable 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 finding 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
successfully.
- 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.
- EXAMPLES
-
$ du -a
1 ./thisfile 1
./thatfile 0
./thosefiles 0
./onefile 0
./twofile 0
./threefile 0
./fourfile 0
./firstfile 0
./lastfile 3 .
$ du -s
3 .
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