du(8) CLIX du(8)
NAME
du - Summarizes disk usage
SYNOPSIS
du [-sar] [name ... ]
FLAGS
-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
read, files that cannot be opened, and so forth, rather than being
silent (the default).
DESCRIPTION
The du command reports 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, the current directory is used.
A file with two or more links is only counted once.
EXAMPLES
1. To display a disk usage grand total for the directory tree starting at
the current directory, enter the following:
du -s .
2. To display disk usage for each file and subdirectory under /usr/lib,
use this command line:
du -a /usr/lib
CAUTIONS
If the -a flag is not used, nondirectories given as arguments are not
listed.
If there are links between files in different directories where the
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du(8) CLIX du(8)
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. (See Chapter
5, File System Administration, in the System Administrator's Guide)
EXIT VALUES
The du command exits with a nonzero value of if it fails.
RELATED INFORMATION
Chapter 5, ``File System Administration'', System Administrator's Guide
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