[NAME]
-df \- report filesystem disk space usage
+df \- report file system disk space usage
[DESCRIPTION]
This manual page
documents the GNU version of
.BR df .
.B df
-displays the amount of disk space available on the filesystem
+displays the amount of disk space available on the file system
containing each file name argument. If no file name is given, the
-space available on all currently mounted filesystems is shown. Disk
+space available on all currently mounted file systems is shown. Disk
space is shown in 1K blocks by default, unless the environment
variable POSIXLY_CORRECT is set, in which case 512-byte blocks are
used.
.PP
If an argument is the absolute file name of a disk device node containing a
-mounted filesystem,
+mounted file system,
.B df
-shows the space available on that filesystem rather than on the
-filesystem containing the device node (which is always the root
-filesystem). This version of
+shows the space available on that file system rather than on the
+file system containing the device node (which is always the root
+file system). This version of
.B df
-cannot show the space available on unmounted filesystems, because on
+cannot show the space available on unmounted file systems, because on
most kinds of systems doing so requires very nonportable intimate
-knowledge of filesystem structures.
+knowledge of file system structures.
.SH OPTIONS