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.