du(1) DG/UX 4.30 du(1)
NAME
du - summarize disk usage
SYNOPSIS
du [ -amrs ] [ names ]
DESCRIPTION
Du gives the number of blocks contained in all files and
(recursively) directories within each directory and file
specified by the names argument. The block count includes
the indirect blocks of the file. If names is missing, . is
used.
The optional argument -s gives only the grand total for each
of the specified names. The optional argument -a generates
an entry for each file. Absence of either generates an
entry for each directory only.
Du is normally silent about directories that cannot be read,
files that cannot be opened, etc. The -r option will cause
du to generate messages in such instances.
Normally, du traverses all subdirectories within each
directory when calculating disk useage. However, if the -m
option is specified, du traverses only those subdirectories
that are within the same file system. (I.e. It doesn't
cross file system mount points.)
A file with two or more links is counted only once.
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.
BUGS
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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