linux man page for du

DU(1)								   User Commands							     DU(1)

NAME
       du - estimate file space usage

SYNOPSIS
       du [OPTION]... [FILE]...
       du [OPTION]... --files0-from=F

DESCRIPTION
       Summarize disk usage of each FILE, recursively for directories.

       Mandatory arguments to long options are mandatory for short options too.

       -a, --all
	      write counts for all files, not just directories

       --apparent-size
	      print  apparent  sizes,  rather  than  disk  usage;  although the apparent size is usually smaller, it may be larger due to holes in
	      (`sparse') files, internal fragmentation, indirect blocks, and the like

       -B, --block-size=SIZE
	      use SIZE-byte blocks

       -b, --bytes
	      equivalent to `--apparent-size --block-size=1'

       -c, --total
	      produce a grand total

       -D, --dereference-args
	      dereference only symlinks that are listed on the command line

       --files0-from=F
	      summarize disk usage of the NUL-terminated file names specified in file F; If F is - then read names from standard input

       -H     equivalent to --dereference-args (-D)

       -h, --human-readable
	      print sizes in human readable format (e.g., 1K 234M 2G)

       --si   like -h, but use powers of 1000 not 1024

       -k     like --block-size=1K

       -l, --count-links
	      count sizes many times if hard linked

       -m     like --block-size=1M

       -L, --dereference
	      dereference all symbolic links

       -P, --no-dereference
	      don't follow any symbolic links (this is the default)

       -0, --null
	      end each output line with 0 byte rather than newline

       -S, --separate-dirs
	      do not include size of subdirectories

       -s, --summarize
	      display only a total for each argument

       -x, --one-file-system
	      skip directories on different file systems

       -X, --exclude-from=FILE
	      exclude files that match any pattern in FILE

       --exclude=PATTERN
	      exclude files that match PATTERN

       --max-depth=N
	      print the total for a directory (or file, with  --all)  only  if	it  is	N  or  fewer  levels  below  the  command  line  argument;
	      --max-depth=0 is the same as --summarize

       --time show time of the last modification of any file in the directory, or any of its subdirectories

       --time=WORD
	      show time as WORD instead of modification time: atime, access, use, ctime or status

       --time-style=STYLE
	      show times using style STYLE: full-iso, long-iso, iso, +FORMAT FORMAT is interpreted like `date'

       --help display this help and exit

       --version
	      output version information and exit

       Display	values	are  in  units	of the first available SIZE from --block-size, and the DU_BLOCK_SIZE, BLOCK_SIZE and BLOCKSIZE environment
       variables.  Otherwise, units default to 1024 bytes (or 512 if POSIXLY_CORRECT is set).

       SIZE may be (or may be an integer optionally followed by) one of following: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T,
       P, E, Z, Y.

PATTERNS
       PATTERN is a shell pattern (not a regular expression).  The pattern ?  matches any one character, whereas * matches any string (composed of
       zero, one or multiple characters).  For example, *.o will match any files whose names end in .o.  Therefore, the command

	      du --exclude='*.o'

       will skip all files and subdirectories ending in .o (including the file .o itself).

AUTHOR
       Written by Torbjorn Granlund, David MacKenzie, Paul Eggert, and Jim Meyering.

REPORTING BUGS
       Report du bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report du translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2010 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       The full documentation for du is maintained as a Texinfo manual.  If the info and du programs are properly installed at your site, the com-
       mand

	      info coreutils 'du invocation'

       should give you access to the complete manual.

GNU coreutils 8.5						   February 2011							     DU(1)