1.\"- 2.\" Copyright (c) 1989, 1990, 1993 3.\" The Regents of the University of California. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. Neither the name of the University nor the names of its contributors 14.\" may be used to endorse or promote products derived from this software 15.\" without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd March 29, 2023 30.Dt DF 1 31.Os 32.Sh NAME 33.Nm df 34.Nd display free disk space 35.Sh SYNOPSIS 36.Nm 37.Op Fl -libxo 38.Op Fl b | g | H | h | k | m | P 39.Op Fl acilnT 40.Op Fl \&, 41.Op Fl t Ar type 42.Op Ar file | filesystem ... 43.Sh DESCRIPTION 44The 45.Nm 46utility 47displays statistics about the amount of free disk space on the specified 48mounted 49.Ar file system 50or on the file system of which 51.Ar file 52is a part. 53By default block counts are displayed with an assumed block size of 54512 bytes. 55If neither a file or a file system operand is specified, 56statistics for all mounted file systems are displayed 57(subject to the 58.Fl t 59option below). 60.Pp 61The following options are available: 62.Bl -tag -width indent 63.It Fl -libxo 64Generate output via 65.Xr libxo 3 66in a selection of different human and machine readable formats. 67See 68.Xr xo_parse_args 3 69for details on command line arguments. 70.It Fl a 71Show all mount points, including those that were mounted with the 72.Dv MNT_IGNORE 73flag. 74This is implied for file systems specified on the command line. 75.It Fl b 76Explicitly use 512 byte blocks, overriding any 77.Ev BLOCKSIZE 78specification from the environment. 79This is the same as the 80.Fl P 81option. 82The 83.Fl k 84option overrides this option. 85.It Fl c 86Display a grand total. 87.It Fl g 88Use 1073741824 byte (1 Gibibyte) blocks rather than the default. 89This overrides any 90.Ev BLOCKSIZE 91specification from the environment. 92.It Fl h 93.Dq Human-readable 94output. 95Use unit suffixes: Byte, Kibibyte, Mebibyte, Gibibyte, Tebibyte and 96Pebibyte (based on powers of 1024) in order to reduce the number of 97digits to four or fewer. 98.It Fl H , Fl Fl si 99Same as 100.Fl h 101but based on powers of 1000. 102.It Fl i 103Include statistics on the number of free and used inodes. 104In conjunction with the 105.Fl h 106or 107.Fl H 108options, the number of inodes is scaled by powers of 1000. 109In case the filesystem has no inodes then 110.Sq - 111is displayed instead of the usage percentage. 112.It Fl k 113Use 1024 byte (1 Kibibyte) blocks rather than the default. 114This overrides the 115.Fl P 116option and any 117.Ev BLOCKSIZE 118specification from the environment. 119.It Fl l 120Select locally-mounted file system for display. 121If used in combination with the 122.Fl t Ar type 123option, file system types will be added or excluded acccording to the 124parameters of that option. 125.It Fl m 126Use 1048576 byte (1 Mebibyte) blocks rather than the default. 127This overrides any 128.Ev BLOCKSIZE 129specification from the environment. 130.It Fl n 131Print out the previously obtained statistics from the file systems. 132This option should be used if it is possible that one or more 133file systems are in a state such that they will not be able to provide 134statistics without a long delay. 135When this option is specified, 136.Nm 137will not request new statistics from the file systems, but will respond 138with the possibly stale statistics that were previously obtained. 139.It Fl P 140Explicitly use 512 byte blocks, overriding any 141.Ev BLOCKSIZE 142specification from the environment. 143This is the same as the 144.Fl b 145option. 146The 147.Fl k 148option overrides this option. 149.It Fl t Ar type 150Select file systems to display. 151More than one type may be specified in a comma separated list. 152The list of file system types can be prefixed with 153.Dq no 154to specify the file system types for which action should 155.Em not 156be taken. 157If used in combination with the 158.Fl l 159option, the parameters of this option will modify the list of 160locally-mounted file systems selected by the 161.Fl l 162option. 163For example, the 164.Nm 165command: 166.Bd -literal -offset indent 167df -t nonfs,nullfs 168.Ed 169.Pp 170lists all file systems except those of type NFS and NULLFS. 171The 172.Xr lsvfs 1 173command can be used to find out the types of file systems 174that are available on the system. 175.It Fl T 176Include file system type. 177.It Fl , 178(Comma) Print sizes grouped and separated by thousands using the 179non-monetary separator returned by 180.Xr localeconv 3 , 181typically a comma or period. 182If no locale is set, or the locale does not have a non-monetary separator, this 183option has no effect. 184.El 185.Sh ENVIRONMENT 186.Bl -tag -width BLOCKSIZE 187.It Ev BLOCKSIZE 188Specifies the units in which to report block counts. 189This uses 190.Xr getbsize 3 , 191which allows units of bytes or numbers scaled with the letters 192.Em k 193(for multiples of 1024 bytes), 194.Em m 195(for multiples of 1048576 bytes) or 196.Em g 197(for gibibytes). 198The allowed range is 512 bytes to 1 GB. 199If the value is outside, it will be set to the appropriate limit. 200.El 201.Sh EXAMPLES 202Show human readable free disk space for all mount points including file system 203type: 204.Bd -literal -offset indent 205$ df -ahT 206Filesystem Type Size Used Avail Capacity Mounted on 207/dev/ada1p2 ufs 213G 152G 44G 78% / 208devfs devfs 1.0K 1.0K 0B 100% /dev 209/dev/ada0p1 ufs 1.8T 168G 1.5T 10% /data 210linsysfs linsysfs 4.0K 4.0K 0B 100% /compat/linux/sys 211/dev/da0 msdosfs 7.6G 424M 7.2G 5% /mnt/usb 212.Ed 213.Pp 214Show previously collected data including inode statistics except for devfs or 215linsysfs file systems. 216Note that the 217.Dq no 218prefix affects all the file systems in the list and the 219.Fl t 220option can be specified only once: 221.Bd -literal -offset indent 222$ df -i -n -t nodevfs,linsysfs 223Filesystem 1K-blocks Used Avail Capacity iused ifree %iused 224Mounted on 225/dev/ada1p2 223235736 159618992 45757888 78% 1657590 27234568 6% / 226/dev/ada0p1 1892163184 176319420 1564470712 10% 1319710 243300576 1% 227/data 228/dev/da0 7989888 433664 7556224 5% 0 0 100% 229/mnt/usb 230.Ed 231.Pp 232Show human readable information for the file system containing the file 233.Pa /etc/rc.conf : 234.Bd -literal -offset indent 235$ df -h /etc/rc.conf 236Filesystem Size Used Avail Capacity Mounted on 237/dev/ada1p2 213G 152G 44G 78% / 238.Ed 239.Pp 240Same as above but specifying some file system: 241.Bd -literal -offset indent 242$ df -h /dev/ada1p2 243Filesystem Size Used Avail Capacity Mounted on 244/dev/ada1p2 213G 152G 44G 78% / 245.Ed 246.Sh NOTES 247For non-Unix file systems, the reported values of used and free inodes 248may have a different meaning than that of used and available files and 249directories. 250An example is msdosfs, which in the case of FAT12 or FAT16 file systems 251reports the number of available and free root directory entries instead 252of inodes 253.Po 254where 1 to 21 such directory entries are required to store 255each file or directory name or disk label 256.Pc . 257.Sh SEE ALSO 258.Xr lsvfs 1 , 259.Xr quota 1 , 260.Xr fstatfs 2 , 261.Xr getfsstat 2 , 262.Xr statfs 2 , 263.Xr getbsize 3 , 264.Xr getmntinfo 3 , 265.Xr libxo 3 , 266.Xr localeconv 3 , 267.Xr xo_parse_args 3 , 268.Xr fstab 5 , 269.Xr mount 8 , 270.Xr pstat 8 , 271.Xr quot 8 , 272.Xr swapinfo 8 273.Sh STANDARDS 274With the exception of most options, 275the 276.Nm 277utility conforms to 278.St -p1003.1-2004 , 279which defines only the 280.Fl k , P 281and 282.Fl t 283options. 284.Sh HISTORY 285A 286.Nm 287command appeared in 288.At v1 . 289.Sh BUGS 290The 291.Fl n 292flag is ignored if a file or file system is specified. 293Also, if a mount 294point is not accessible by the user, it is possible that the file system 295information could be stale. 296.Pp 297The 298.Fl b 299and 300.Fl P 301options are identical. 302The former comes from the BSD tradition, and the latter is required 303for 304.St -p1003.1-2004 305conformity. 306