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Index: head/bin/df/df.1
===================================================================
--- head/bin/df/df.1
+++ head/bin/df/df.1
@@ -29,7 +29,7 @@
.\" @(#)df.1 8.3 (Berkeley) 5/8/95
.\" $FreeBSD$
.\"
-.Dd August 8, 2017
+.Dd October 5, 2020
.Dt DF 1
.Os
.Sh NAME
@@ -98,12 +98,9 @@
Pebibyte (based on powers of 1024) in order to reduce the number of
digits to four or fewer.
.It Fl H , Fl Fl si
-.Dq Human-readable
-output.
-Use unit suffixes: Byte, Kilobyte, Megabyte,
-Gigabyte, Terabyte and Petabyte (based on powers of 1000) in order to
-reduce the number of
-digits to four or fewer.
+Same as
+.Fl h
+but based on powers of 1000.
.It Fl i
Include statistics on the number of free and used inodes.
In conjunction with the
@@ -159,10 +156,7 @@
df -t nonfs,nullfs
.Ed
.Pp
-lists all file systems except those of type
-.Tn NFS
-and
-.Tn NULLFS .
+lists all file systems except those of type NFS and NULLFS.
The
.Xr lsvfs 1
command can be used to find out the types of file systems
@@ -193,6 +187,52 @@
The allowed range is 512 bytes to 1 GB.
If the value is outside, it will be set to the appropriate limit.
.El
+.Sh EXAMPLES
+Show human readable free disk space for all mount points including file system
+type:
+.Bd -literal -offset indent
+$ df -ahT
+Filesystem Type Size Used Avail Capacity Mounted on
+/dev/ada1p2 ufs 213G 152G 44G 78% /
+devfs devfs 1.0K 1.0K 0B 100% /dev
+/dev/ada0p1 ufs 1.8T 168G 1.5T 10% /data
+linsysfs linsysfs 4.0K 4.0K 0B 100% /compat/linux/sys
+/dev/da0 msdosfs 7.6G 424M 7.2G 5% /mnt/usb
+.Ed
+.Pp
+Show previously collected data including inode statistics except for devfs or
+linsysfs file systems.
+Note that the
+.Dq no
+prefix affects all the file systems in the list and the
+.Fl t
+option can be specified only once:
+.Bd -literal -offset indent
+$ df -i -n -t nodevfs,linsysfs
+Filesystem 1K-blocks Used Avail Capacity iused ifree %iused
+Mounted on
+/dev/ada1p2 223235736 159618992 45757888 78% 1657590 27234568 6% /
+/dev/ada0p1 1892163184 176319420 1564470712 10% 1319710 243300576 1%
+/data
+/dev/da0 7989888 433664 7556224 5% 0 0 100%
+/mnt/usb
+.Ed
+.Pp
+Show human readable information for the file system containing the file
+.Pa /etc/rc.conf
+:
+.Bd -literal -offset indent
+$ df -h /etc/rc.conf
+Filesystem Size Used Avail Capacity Mounted on
+/dev/ada1p2 213G 152G 44G 78% /
+.Ed
+.Pp
+Same as above but specifying some file system:
+.Bd -literal -offset indent
+$ df -h /dev/ada1p2
+Filesystem Size Used Avail Capacity Mounted on
+/dev/ada1p2 213G 152G 44G 78% /
+.Ed
.Sh SEE ALSO
.Xr lsvfs 1 ,
.Xr quota 1 ,

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