df(1)              UNIX System V(BSD Compatibility Package)               df(1)


NAME
      df - report free disk space on file systems

SYNOPSIS
      df [-a] [-i] [-t type] [filesystem . . . ] [filename . . . ]

DESCRIPTION
      df displays the amount of disk space occupied by currently mounted file
      systems, the amount of used and available space, and how much of the file
      system's total capacity has been used.  Used without arguments, df
      reports on all mounted file systems, producing something like:
            Filesystem  kbytes  used  avail  capacity  Mounted on
            /dev/root    7445   4714  1986     70%     /
            /dev/0s10    5148   3279  1868     64%     /stand

      Note that used+avail is less than the amount of space in the file system
      (kbytes); this is because the system reserves a fraction of the space in
      the file system to allow its file system allocation routines to work
      well.  The amount reserved is typically about 10%; this may be adjusted
      using tunefs(1M).  When all the space on a file system except for this
      reserve is in use, only the super-user can allocate new files and data
      blocks to existing files.  When a file system is overallocated in this
      way, df may report that the file system is more than 100% utilized.

      If arguments to df are disk partitions (for example, /dev/root or
      pathnames, df produces a report on the file system containing the named
      file.  Thus df .  shows the amount of space on the file system containing
      the current directory.

   Options
      The options for df are as follows:

      -a    Reports on all filesystems including the uninteresting ones which
            have zero total blocks.  (For example, automounter)

      -i    Report the number of used and free inodes.

      -t  type
            Report on filesystems of a given type (for example, nfs or 4.2).

FILES
      /etc/mtab List of filesystems currently mounted.

SEE ALSO
      du(1M), quot(1M), and tunefs(1M) in the System Administrator's Reference
      Manual








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