df - Linux Man Page

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

DESCRIPTION
      This  manual  page  documents  the  GNU version of df.  df displays the
      amount of disk space available on the file system containing each  file
      name  argument.   If  no file name is given, the space available on all
      currently mounted file systems is shown.  Disk space  is  shown  in  1K
      blocks  by  default, unless the environment variable POSIXLY_CORRECT is
      set, in which case 512-byte blocks are used.

      If an argument is the absolute file name of a disk device node contain-
      ing  a  mounted  file system, df shows the space available on that file
      system rather than on the file system containing the device node (which
      is  always  the  root file system).  This version of df cannot show the
      space available on unmounted file systems, because  on  most  kinds  of
      systems  doing  so requires very nonportable intimate knowledge of file
      system structures.

OPTIONS
      Show information about the file system on which each FILE  resides,  or
      all file systems by default.

      Mandatory  arguments  to  long  options are mandatory for short options
      too.

      -a, --all
             include dummy file systems

      -B, --block-size=SIZE
             use SIZE-byte blocks

      -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

      --no-sync
             do not invoke sync before getting usage info (default)

      -P, --portability
             use the POSIX output format

      --sync invoke sync before getting usage info
      --help display this help and exit

      --version
             output version information and exit

      SIZE may be (or may be an integer optionally followed by) one  of  fol-
      lowing: kB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T,
      P, E, Z, Y.

REPORTING BUGS
      Report bugs to .

COPYRIGHT
      Copyright (C) 2008 Free Software Foundation, Inc.  License GPLv3+:  GNU
      GPL version 3 or later 
      This  is  free  software:  you  are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.