df [OPTION]... [FILE]...

• 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.
  

• Display statistics for all filesystems in "human-readable" output.
  

  $ df -h
  Filesystem      Size  Used Avail Use% Mounted on
  /dev/sda1        20G  8.5G   10G  46% /
  /dev/sda2       100G   45G   50G  48% /home
  tmpfs           2.0G     0  2.0G   0% /dev/shm
  /dev/sda3       500M   25M  450M   6% /boot
  

• Display statistics for filesystems of the specified types only.
  

  $ df -t ext4
  Filesystem     1K-blocks    Used Available Use% Mounted on
  /dev/sda1       20971520 8912896  10485760  46% /
  /dev/sda2      104857600 47185920  52428800  48% /home
  

• Display statistics for all filesystems except the specified types.
  

  $ df -x tmpfs
  Filesystem     1K-blocks    Used Available Use% Mounted on
  /dev/sda1       20971520 8912896  10485760  46% /
  /dev/sda2      104857600 47185920  52428800  48% /home
  /dev/sda3         512000   25600    460800   6% /boot
  

• Display inodes information along with disk space.
  

  $ df -i
  Filesystem      Inodes   IUsed   IFree IUse% Mounted on
  /dev/sda1      1310720  145632 1165088   12% /
  /dev/sda2      6553600  98304  6455296    2% /home
  tmpfs           524288       1  524287    1% /dev/shm
  

-a, --all
|Include pseudo, duplicate, inaccessible file systems.

-B, --block-size=SIZE
|Scale sizes by SIZE before printing them.
|SIZE may be followed by the following multiplicative suffixes: kB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on.

-h, --human-readable
|Print sizes in human readable format (e.g., 1K 234M 2G).

-H, --si
|Likewise, but use powers of 1000 not 1024.

-i, --inodes
|List inode information instead of block usage.

-k
|Like --block-size=1K.

-l, --local
|Limit listing to local file systems.

-P, --portability
|Use the POSIX output format.

-t, --type=TYPE
|Limit listing to file systems of type TYPE.

-T, --print-type
|Print file system type.

-x, --exclude-type=TYPE
|Limit listing to file systems not of type TYPE.

--help
|Display help message and exit.

--version
|Output version information and exit.