du-Linux Command

du

Estimate file space usage, reports the amount of disk space used by the specified files and for each subdirectory.

SYNTAX
      du [options]... [file]...

With no arguments, `du' reports the disk space for the current directory. Normally the disk space is printed in units of 1024 bytes, but this can be overridden

OPTIONS

`-a'
`--all'
     Show counts for all files, not just directories.

`-b'
`--bytes'
     Print sizes in bytes, overriding the default block size (*note
     Block size::).

`-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.

`-h'
`--human-readable'
     Append a size letter such as `M' for megabytes to each size.
     Powers of 1024 are used, not 1000; `M' stands for 1,048,576 bytes.
     Use the `-H' or `--si' option if you prefer powers of 1000.

`-H'
`--si'
     Append a size letter such as `M' for megabytes to each size.  (SI
     is the International System of Units, which defines these letters
     as prefixes.)  Powers of 1000 are used, not 1024; `M' stands for
     1,000,000 bytes.  Use the `-h' or `--human-readable' option if you
     prefer powers of 1024.

`-k'
`--kilobytes'
     Print sizes in 1024-byte blocks, overriding the default block size
     (*note Block size::).

`-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).

`--max-depth=DEPTH'
     Show the total for each directory (and file if -all) that is at
     most MAX_DEPTH levels down from the root of the hierarchy.  The
     root is at level 0, so `du --max-depth=0' is equivalent to `du -s'.

`-m'
`--megabytes'
     Print sizes in megabyte (that is, 1,048,576-byte) blocks.

`-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.

`--exclude=PAT'
     When recursing, skip subdirectories or files matching PAT.  For
     example, `du --exclude='*.o'' excludes files whose names end in
     `.o'.

`-X FILE'
`--exclude-from=FILE'
     Like `--exclude', except take the patterns to exclude from FILE,
     one per line.  If FILE is `-', take the patterns from standard
     input.

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.