df [filesystem | file | directory ...]

• For each filesystem specified, the "df" command displays statistics about the amount of free disk space on the specified filesystem.
  
  
• For each file or directory specified, the "df" command displays statistics about the amount of free disk space on the filesystem of which a file or directory is a part.
  
  
• If none is specified, the "df" command displays statistics for all mounted filesystems.
  

Disk space values are displayed in 512-byte per block counts.

• Display statistics for all filesystems in "human-readable" output.
  $ df -H Filesystem Size Used Avail Capacity iused ifree %iused Mounted on /dev/disk1 1000G 500G 500G 50% - - 50% /disk1 devfs 500k 500k 0B 100% - 0 100% /dev1 foofs 0B 0B 0B 100% 0 0 100% /foo1 barfs 0B 0B 0B 100% 0 0 100% /bar1
  
• Display statistics for filesystems of the specified types only.
  $ df -HT devfs,hfs Filesystem Size Used Avail Capacity iused ifree %iused Mounted on /dev/disk1 1000G 500G 500G 50% - - 50% /disk1 devfs 500k 500k 0B 100% - 0 100% /dev1
  
• Display statistics for all filesystems except the specified types.
  $ df -HT nodevfs,hfs foofs 0B 0B 0B 100% 0 0 100% /foo1 barfs 0B 0B 0B 100% 0 0 100% /bar1
  
• (OS X) Display filesystems available on the system.
  $ lsvfs Filesystem ---------- nfs hfs devfs CoreStorage autofs
  

The following options can be used:
-a |Show all mounted filesystems. -l |Only display information about locally-mounted filesystems. -i |Include statistics on the number of free inodes. |This option is now the default to conform to Version 3 of the Single UNIX Specification (``SUSv3'') |Use -P to suppress this output. -T |Only display statistics for filesystems of the specified types. |More than one type may be specified in a comma separated list. |The list of filesystem types can be prefixed with "no" to specify the filesystem types for which action should not be taken. |The lsvfs command can be used to display filesystems that are available on the system. -H |"Human-readable" output. |Use unit suffixes: Byte (-b), Kilobyte (-k), Megabyte (-m), Gigabyte (-g) in order to reduce the number of digits to three or less using base 10 for sizes. -h |"Human-readable" output. |Use unit suffixes: Byte (-b), Kilobyte (-k), Megabyte (-m), Gigabyte (-g) in order to reduce the number of digits to three or less using base 2 for sizes. -b (the default) |Use 512-byte blocks. |This is only useful as a way to override the BLOCKSIZE specification from the environment. -k |Use 1024-byte (1-Kbyte) blocks. |Note that this overrides the BLOCKSIZE specification from the environment. -m |Use 1048576-byte (1-Mbyte) blocks. |Note that this overrides the BLOCKSIZE specification from the environment. -g |Use 1073741824-byte (1-Gbyte) blockst. |Note that this overrides the BLOCKSIZE specification from the environment.