.Dd February 2, 2015
.Dt DF 1
.Os ubase
.Sh NAME
.Nm df
.Nd show file system usage
.Sh SYNOPSIS
.Nm
.Op Fl ahis
.Sh DESCRIPTION
.Nm
displays the amount of disk space available on a file system.
If no arguments are given,
.Nm
shows all the file systems using 512-byte blocks.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl a
Show all file systems including dummy ones. This is the default
option.
.It Fl h
Not implemented.
.It Fl i
Not implemented.
.It Fl s
Not implemented.
.El