du(1) DG/UX 4.31 du(1)
NAME
du - summarize disk usage
SYNOPSIS
du [ -amrs ] [ name ... ]
name The name of a directory or regular file; default = .
DESCRIPTION
Du gives the number of blocks contained in all files and
(recursively) directories within each directory and file
specified by the name argument. The block count includes
the indirect blocks of the file.
A file with two or more links is counted only once.
Options are:
-a Generate an entry for each file.
-m Traverse only those subdirectories that are within the
same file system (i.e., don't cross file system mount
points). Normally, du traverses all subdirectories
within each directory when calculating disk usage.
-r Generate a message for each directory that cannot be
read, each file that cannot be opened, etc. By default
du is silent in such instances.
-s Give only the grand total for each of the specified
directories. Absence of either -a or -s generates an
entry for each directory only.
EXAMPLES
du | egrep '^[1-9][0-9][0-9]+'
Displays the directories and sub-directories which have a
larger block count than 100. The output of du is piped to
egrep, and egrep searches for strings that start with the
number 100 or greater.
NOTES
If the -a option is not used, non-directories given as
arguments are not listed.
If there are too many distinct linked files, du will abort.
Files with holes in them will get an incorrect block count.
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