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.\"     @(#)du.1	6.13 (Berkeley) 6/20/91
.\"
.Dd June 20, 1991
.Dt DU 1
.Os BSD 4.4
.Sh NAME
.Nm du
.Nd Display disk usage statistics
.Sh SYNOPSIS
.Nm du
.Op Fl a Li \&| Fl s
.Op Fl kx
.Op Ar file ...
.Sh DESCRIPTION
The
.Nm du
utility displays the file system block usage for each file argument
and for each directory in the file hierarchy rooted in each directory
argument.
If no file is specified, the block usage of the hierarchy rooted in
the current directory is displayed.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl a
Display an entry for each file in the file hierarchy.
.It Fl k
By default,
.Nm du
displays the number of blocks as returned by the
.Xr stat  2
system call, i.e. 512-byte blocks.
If the
.Fl k
flag is specified, the number displayed is the number of 1024-byte
blocks.
Partial numbers of blocks are rounded up.
.It Fl s
Display only the grand total for the specified files.
.It Fl x
Filesystem mount points are not traversed.
.El
.Pp
If
.Ar file
is a symbolic link referencing an existing file, the file referenced
by the link is reported on instead of the link itself.
.Pp
Files having multiple hard links are counted (and displayed) a single
time per
.Nm du
execution.
.Sh SEE ALSO
.Xr df 1 ,
.Xr quot 8
.Sh HISTORY
A
.Nm
command appeared in
.At v6 .