du.1 (2010 09)

d
du(1) du(1)
NAME
du - summarize disk usage
SYNOPSIS
du [-a-s][-bkrx
][-H-L][-t type ][name ]...
DESCRIPTION
The
du command gives the number of 512-byte blocks allocated for all files and (recursively) directories
within each directory and file specified by the name operands. The block count includes the indirect
blocks of the file. A file with two or more links is counted only once. If name is missing, the current
working directory is used.
By default,
du generates an entry only for the name operands and each directory contained within those
hierarchies.
By default, when a symbolic link is encountered on the command line or in the file hierarchy,
du will
count the size of the symbolic link rather than the file referenced by the link, and will not follow the link
to another portion of the file hierarchy.
Options
The
du command recognizes the following options:
-a Print entries for each file encountered in the directory hierarchies in addition to the
normal output.
-b For each name operand that is a directory for which file system swap has been
enabled, print the number of blocks the swap system is currently using.
-H If a symbolic link is specified on the command line, du will count the size of the file
or file hierarchy referenced by the link. Unlike the -L option, it will not follow
symbolic links encountered during the traversal of the directory hierarchy.
-k Gives the block count in 1024-byte blocks.
-L If a symbolic link is specified on the command line or encountered during the
traversal of a file hierarchy, du will count the size of the file or file hierarchy refer-
enced by the link.
-r Print messages about directories that cannot be read, files that cannot be accessed,
and so on. du is normally silent about such conditions.
-s Print only the grand total of disk usage for each of the specified name operands.
-t type Restrict reporting to file systems of the specified type . (Example values for type are
hfs, cdfs, nfs, and so on.) Multiple -t type options can be specified. Disk
usage is normally reported for the entire directory hierarchy below each of the given
name operands.
-x Restrict reporting to only those files that have the same device as the file specified
by the name operand. Disk usage is normally reported for the entire directory
hierarchy below each of the given name operands.
According to the standards, specifying more than one of the mutually-exclusive options
-H and -L will
not be considered an error. The last option specified will determine the behavior of the utility.
EXAMPLES
Display disk usage for the current working directory and all directories below it, generating error mes-
sages for unreadable directories:
du -r
Display disk usage for the entire file system except for any cdfs or nfs mounted file systems:
du -t hfs /
Display disk usage for files on the root volume (/) only. No usage statistics are collected for any other
mounted file systems:
du -x /
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1