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DF(1) General Commands Manual DF(1) NAME df -- display free disk space SYNOPSIS df [--libxo] [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-,] [-t type] [file | filesystem ...] DESCRIPTION The df utility displays statistics about the amount of free disk space on the specified mounted file system or on the file system of which file is a part. By default block counts are displayed with an assumed block size of 512 bytes. If neither a file or a file system operand is specified, sta- tistics for all mounted file systems are displayed (subject to the -t op- tion below). The following options are available: --libxo Generate output via libxo(3) in a selection of different human and machine readable formats. See xo_options(7) for details on command line arguments. -a Show all mount points, including those that were mounted with the MNT_IGNORE flag. This is implied for file systems specified on the command line. -b Explicitly use 512 byte blocks, overriding any BLOCKSIZE specifica- tion from the environment. This is the same as the -P option. The -k option overrides this option. -c Display a grand total. -g Use 1073741824 byte (1 Gibibyte) blocks rather than the default. This overrides any BLOCKSIZE specification from the environment. -h "Human-readable" output. Use unit suffixes: Byte, Kibibyte, Mebibyte, Gibibyte, Tebibyte and Pebibyte (based on powers of 1024) in order to reduce the number of digits to four or fewer. -H, --si Same as -h but based on powers of 1000. -i Include statistics on the number of free and used inodes. In con- junction with the -h or -H options, the number of inodes is scaled by powers of 1000. In case the filesystem has no inodes then `-' is displayed instead of the usage percentage. -k Use 1024 byte (1 Kibibyte) blocks rather than the default. This overrides the -P option and any BLOCKSIZE specification from the environment. -l Select a locally-mounted file system for display. If used in com- bination with the -t type option, file system types will be added or excluded according to the parameters of that option. -m Use 1048576 byte (1 Mebibyte) blocks rather than the default. This overrides any BLOCKSIZE specification from the environment. -n Print out the previously obtained statistics from the file systems. This option should be used if it is possible that one or more file systems are in a state such that they will not be able to provide statistics without a long delay. When this option is specified, df will not request new statistics from the file systems, but will re- spond with the possibly stale statistics that were previously ob- tained. -P Explicitly use 512 byte blocks, overriding any BLOCKSIZE specifica- tion from the environment. This is the same as the -b option. The -k option overrides this option. -t type Select file systems to display. More than one type may be speci- fied in a comma separated list. The list of file system types can be prefixed with "no" to specify the file system types for which action should not be taken. If used in combination with the -l op- tion, the parameters of this option will modify the list of lo- cally-mounted file systems selected by the -l option. For example, the df command: df -t nonfs,nullfs lists all file systems except those of type NFS and NULLFS. The lsvfs(1) command can be used to find out the types of file systems that are available on the system. -T Include file system type. -, (Comma) Print sizes grouped and separated by thousands using the non-monetary separator returned by localeconv(3), typically a comma or period. If no locale is set, or the locale does not have a non- monetary separator, this option has no effect. ENVIRONMENT BLOCKSIZE Specifies the units in which to report block counts. This uses getbsize(3), which allows units of bytes or numbers scaled with the letters k (for multiples of 1024 bytes), m (for multiples of 1048576 bytes) or g (for gibibytes). The allowed range is 512 bytes to 1 GB. If the value is outside, it will be set to the appropriate limit. EXAMPLES Show human readable free disk space for all mount points including file system type: $ 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 Show previously collected data including inode statistics except for devfs or linsysfs file systems. Note that the "no" prefix affects all the file systems in the list and the -t option can be specified only once: $ 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 Show human readable information for the file system containing the file /etc/rc.conf: $ df -h /etc/rc.conf Filesystem Size Used Avail Capacity Mounted on /dev/ada1p2 213G 152G 44G 78% / Same as above but specifying some file system: $ df -h /dev/ada1p2 Filesystem Size Used Avail Capacity Mounted on /dev/ada1p2 213G 152G 44G 78% / NOTES For non-Unix file systems, the reported values of used and free inodes may have a different meaning than that of used and available files and directo- ries. An example is msdosfs, which in the case of FAT12 or FAT16 file sys- tems reports the number of available and free root directory entries in- stead of inodes (where 1 to 21 such directory entries are required to store each file or directory name or disk label). SEE ALSO lsvfs(1), quota(1), fstatfs(2), getfsstat(2), statfs(2), getbsize(3), getm- ntinfo(3), libxo(3), localeconv(3), xo_options(7), fstab(5), mount(8), pstat(8), quot(8), swapinfo(8) STANDARDS With the exception of most options, the df utility conforms to IEEE Std 1003.1-2004 ("POSIX.1"), which defines only the -k, -P and -t options. HISTORY A df command appeared in Version 1 AT&T UNIX. BUGS The -n flag is ignored if a file or file system is specified. Also, if a mount point is not accessible by the user, it is possible that the file system information could be stale. The -b and -P options are identical. The former comes from the BSD tradi- tion, and the latter is required for IEEE Std 1003.1-2004 ("POSIX.1") con- formity. FreeBSD ports 15.quarterly July 16, 2025 DF(1)
NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | EXAMPLES | NOTES | SEE ALSO | STANDARDS | HISTORY | BUGS
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