DU(1M) DU(1M)
NAME
du - summarize disk usage
SYNOPSIS
du [ -sar ] [ names ]
DESCRIPTION
du reports the number of blocks (512 bytes per block)
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,
which may not be correct for the given underlying
filesystem. If names is missing, the current directory is
used.
The optional arguments are as follows:
-s causes only the grand total (for each of the specified
names) to be given.
-a causes an output line to be generated for each file.
If neither -s or -a is specified, an output line is
generated for each directory only.
-r will cause du to generate messages about directories
that cannot be be read, files that cannot be opened,
etc., rather than being silent (the default).
A file with two or more links is only counted once.
BUGS
If the -a option is not used, non-directories given as
arguments are not listed.
If there are links between files in different directories
where the directories are on separate branches of the file
system hierarchy, du will count the excess files more than
once.
Files with holes in them will get an incorrect block count.
du should not know about the underlying filesystem
implementation.
du prints out blocks that are 512 bytes long, whereas df
prints out blocks that are 1024 bytes long.
ORIGIN
AT&T V.3
Page 1 (last mod. 8/20/87)