Originální popis anglicky:
du - estimate file space usage
Návod, kniha: General Commands Manual
du [options] [file...]
POSIX options:
[-askx] [--]
GNU options (shortest form):
[-abcDhHklLmsSxX]
[--block-size=size]
[--exclude=pattern] [--max-depth=n]
[--help] [--version] [--]
du reports the amount of disk space used by the specified files, and by
each directory in the hierarchies rooted at the specified files. Here `disk
space used' means space used for the entire file hierarchy below the specified
file.
With no arguments,
du reports the disk space for the current directory.
The output is in 512-byte units by default, but in 1024-byte units when the -k
option is given.
The output is in 1024-byte units (when no units are specified by options),
unless the environment variable
POSIXLY_CORRECT is set, in which case
POSIX is followed.
- -a
- Show counts for all files encountered, not just
directories.
- -k
- Use 1024-byte units instead of the default 512-byte
units.
- -s
- Only output space usage for the actual arguments given, not
for their subdirectories.
- -x
- Only count space on the same device as the argument
given.
- --
- Terminate option list.
- -a, --all
- Show counts for all files, not just directories.
- -b, --bytes
- Print sizes in bytes, instead of kilobytes.
- --block-size=size
- Print sizes in blocks of size bytes. (New in
fileutils-4.0.)
- -c, --total
- Print a grand total of all arguments after all arguments
have been processed. This can be used to find out the total disk usage of
a given set of files or directories.
- -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, such as /usr/tmp, which are often
symbolic links.
- --exclude=pattern
- When recursing, skip subdirectories or files matching
pattern. The pattern may be any standard Bourne shell file
glob pattern. (New in fileutils-4.0.)
- -h, --human-readable
- Append a size letter, such as M for binary megabytes
(`mebibytes'), to each size.
- -H, --si
- Do the same as for -h, but use the official SI units
(with powers of 1000 instead of 1024, so that M stands for 1000000 instead
of 1048576). (New in fileutils-4.0.)
- -k, --kilobytes
- Print sizes in KiB (binary kilobytes, 1024 bytes).
- -l, --count-links
- Count the size of all files, even if they have appeared
already (as a hard link).
- -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).
- -m, --megabytes
- Print sizes in MiB (binary megabytes, 1048576 bytes).
- --max-depth=n
- Print the total for a directory (or file, with the
-a flag) only if it is n or fewer levels below the command
line argument; --max-depth=0 is the same as the -s
flag. (New in fileutils-4.0.)
- -s, --summarize
- Display only a total for each argument.
- -S, --separate-dirs
- Report the size of each directory separately, not including
the sizes of subdirectories.
- -x, --one-file-system
- Skip directories that are on different filesystems from the
one that the argument being processed is on.
- -X file,
--exclude-from=file
- Like --exclude, except take the patterns to exclude
from the specified file. Patterns are listed one per line. If
file is given as `-', patterns are read from standard input. (New
in fileutils-4.0.)
- --help
- Print a usage message on standard output and exit
successfully.
- --version
- Print version information on standard output, then exit
successfully.
- --
- Terminate option list.
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.
The variable POSIXLY_CORRECT determines the choice of unit. If it is not set,
and the variable BLOCKSIZE has a value starting with `HUMAN', then behaviour
is as for the -h option, unless overridden by -k or -m options. The variables
LANG, LC_ALL, LC_CTYPE and LC_MESSAGES have the usual meaning.
POSIX 1003.2
This page describes
du as found in the fileutils-4.0 package; other
versions may differ slightly.
