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DF(1M)									DF(1M)

NAME
       df - displays number of free disk blocks and free files

SYNOPSIS
       /usr/bin/df [-F FSType] [-abeghklmnPtVvZ]
	    [-o FSType-specific_options]
	    [block_device | directory | file | resource ...]

DESCRIPTION
       The df utility displays the amount of disk space occupied by mounted or
       unmounted file systems, the amount of used and available space, and how
       much of the file system's total capacity has been used. The file system
       is specified by device, or by referring to a file or directory  on  the
       specified file system.

       Used  without  operands or options, df reports on all mounted file sys‐
       tems.

       df may not be supported for all FSTypes.

       If df is run on a networked mount point that the	 automounter  has  not
       yet  mounted, the file system size will be reported as zero. As soon as
       the automounter mounts the file system, the sizes will be reported cor‐
       rectly.

OPTIONS
       -a

	   Reports  on	all  file  systems  including  ones  whose  entries in
	   /etc/mnttab (see mnttab(4)) have the ignore option set.

       -b

	   Prints the total number of kilobytes free.

       -e

	   Prints only the number of files free.

       -F FSType

	   Specifies the FSType on which to operate. The -F option is intended
	   for use with unmounted file systems. The FSType should be specified
	   here or be determinable from /etc/vfstab (see vfstab(4)) by	match‐
	   ing	the  directory, block_device, or resource with an entry in the
	   table, or by consulting /etc/default/fs. See default_fs(4).

       -g

	   Prints the entire statvfs(2) structure. This option	is  used  only
	   for	mounted	 file  systems. It can not be used with the -o option.
	   This option overrides the -b, -e, -k, -n, -P, and -t options.

       -h

	   Like -k, except that sizes are in a more human readable format. The
	   output  consists of one line of information for each specified file
	   system. This information includes the file system name,  the	 total
	   space  allocated  in the file system, the amount of space allocated
	   to existing files, the total amount of space available for the cre‐
	   ation  of  new  files  by unprivileged users, and the percentage of
	   normally available space that is currently allocated to  all	 files
	   on  the  file system. All sizes are scaled to a human readable for‐
	   mat, for example, 14K, 234M, 2.7G, or  3.0T.	 Scaling  is  done  by
	   repetitively dividing by 1024.

	   This	 option	 overrides the -b, -e, -g, -k, -n, -t, and -V options.
	   This option only works on mounted filesystems and can not  be  used
	   together with -o option.

       -k

	   Prints the allocation in kbytes. The output consists of one line of
	   information	for  each  specified  file  system.  This  information
	   includes  the  file	system	name, the total space allocated in the
	   file system, the amount of space allocated to existing  files,  the
	   total  amount  of  space available for the creation of new files by
	   unprivileged users, and the percentage of normally available	 space
	   that	 is  currently allocated to all files on the file system. This
	   option overrides the -b, -e, -n, and -t options.

       -l

	   Reports on local file systems only. This option is  used  only  for
	   mounted file systems. It can not be used with the -o option.

       -m

	   Like -k, except prints the allocation in mbytes.

       -n

	   Prints  only the FSType name. Invoked with no operands, this option
	   prints a list of mounted file system types.	This  option  is  used
	   only	 for  mounted  file  systems.  It  can not be used with the -o
	   option.

       -o FSType-specific_options

	   Specifies FSType-specific options. These  options  are  comma-sepa‐
	   rated,  with	 no  intervening  spaces.  See the manual page for the
	   FSType-specific command for details.

       -t

	   Prints full listings with totals. This option overrides the -b, -e,
	   and -n options.

       -V

	   Echoes  the complete set of file system specific command lines, but
	   does not execute them. The command line is generated by  using  the
	   options and operands provided by the user and adding to them infor‐
	   mation derived from /etc/mnttab, /etc/vfstab,  or  /etc/default/fs.
	   This option may be used to verify and validate the command line.

       -Z

	   Displays  mounts in all visible zones. By default, df only displays
	   mounts located within the current zone. This option has  no	effect
	   in a non-global zone.

       -v

	   Like -k, except that sizes are displayed in multiples of the small‐
	   est block size supported by each specified file system.

	   The output consists of one line of information for each  file  sys‐
	   tem. This one line of information includes the following:

	       o      the file system's mount point

	       o      the file system's name

	       o      the total number of blocks allocated to the file system

	       o      the number of blocks allocated to existing files

	       o      the  number  of blocks available for the creation of new
		      files by unprivileged users

	       o      the percentage of blocks in use by files

       -P

	   Same as -h except in 512-byte units.

OPERANDS
       The df utility interprets operands according to	the  following	prece‐
       dence:  block_device,  directory, file. The following operands are sup‐
       ported:

       block_device

	   Represents a block special device (for example, /dev/dsk/c1d0s7).

       directory

	   Represents a valid directory name. df reports on  the  file	system
	   that contains directory.

       file

	   Represents  a  valid	 file name. df reports on the file system that
	   contains file.

       resource

	   Represents an NFS resource name.

USAGE
       See largefile(5) for the description of the behavior of df when encoun‐
       tering files greater than or equal to 2 Gbyte ( 2^31 bytes).

EXAMPLES
       Example 1 Executing the df command

       The following example shows the df command and its output:

	 example% /usr/bin/df

	 /		    (/dev/dsk/c0t0d0s0 ):  287530 blocks    92028 files
	 /system/contract   (ctfs	       ):	0 blocks 2147483572 files
	 /system/object	    (objfs	       ):	0 blocks 2147483511 files
	 /usr		    (/dev/dsk/c0t0d0s6 ): 1020214 blocks   268550 files
	 /proc		    (/proc	       ):	0 blocks      878 files
	 /dev/fd	    (fd		       ):	0 blocks	0 files
	 /etc/mnttab	    (mnttab	       ):	0 blocks	0 files
	 /var/run	    (swap	       ):  396016 blocks     9375 files
	 /tmp		    (swap	       ):  396016 blocks     9375 files
	 /opt		    (/dev/dsk/c0t0d0s5 ):  381552 blocks    96649 files
	 /export/home	    (/dev/dsk/c0t0d0s7 ):  434364 blocks   108220 files

       where  the  columns represent the mount point, device (or "filesystem",
       according to df -k), free blocks, and  free  files,  respectively.  For
       contract file systems, /system/contract is the mount point, ctfs is the
       contract	 file  system  (used  by  SMF)	with   0   free	  blocks   and
       2147483582(INTMAX-1)   free  files.  For	 object	 file  systems,	 /sys‐
       tem/object is the mount point, objfs is the  object  file  system  (see
       objfs(7FS)) with 0 free blocks and 2147483511 free files.

       Example 2 Writing Portable Information About the /usr File System

       The  following  example writes portable information about the /usr file
       system:

	 example% /usr/bin/df -P /usr

       Example 3 Writing Portable Information About the /usr/src file System

       Assuming that /usr/src is part of the /usr file system,	the  following
       example writes portable information :

	 example% /usr/bin/df -P /usr/src

       Example 4 Using df to Display Inode Usage

       The following example displays inode usage on all ufs file systems:

	 example%/usr/bin/df -F ufs -o i

ENVIRONMENT VARIABLES
       SYSV3

	   This	 variable  is  used to override the default behavior of df and
	   provide compatibility with INTERACTIVE UNIX	System	and  SCO  UNIX
	   installation scripts. As the SYSV3 variable is provided for compat‐
	   ibility purposes only, it should not be used in new scripts.

       When set, any header which normally displays "files" will  now  display
       "nodes".	  See environ(5) for descriptions of the following environment
       variables that affect the execution  of	df:  LANG,  LC_ALL,  LC_CTYPE,
       LC_MESSAGES, and NLSPATH.

EXIT STATUS
       The following exit values are returned:

       0

	   Successful completion.

       >0

	   An error occurred.

FILES
       /dev/dsk/*

	   Disk devices

       /etc/default/fs

	   Default  local  file system type. Default values can be set for the
	   following flags in /etc/default/fs. For example:  LOCAL=ufs,	 where
	   LOCAL is the default partition for a command if no FSType is speci‐
	   fied.

       /etc/mnttab

	   Mount table

       /etc/vfstab

	   List of default parameters for each file system

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌────────────────────┬─────────────────┐
       │  ATTRIBUTE TYPE    │ ATTRIBUTE VALUE │
       ├────────────────────┼─────────────────┤
       │Interface Stability │ Standard	      │
       └────────────────────┴─────────────────┘

SEE ALSO
       find(1), df_ufs(1M), mount(1M), statvfs(2),  default_fs(4),  mnttab(4),
       vfstab(4),   attributes(5),   environ(5),  largefile(5),	 standards(5),
       objfs(7FS)

NOTES
       If UFS logging is enabled on a file system, the disk space used for the
       log  is	reflected  in  the  df	report. The log is allocated from free
       blocks on the file system, and it is sized approximately 1 Mbyte per  1
       Gbyte of file system, up to 256 Mbytes. The log size may be larger  (up
       to a maximum of 512 Mbytes) depending on the number of  cylinder groups
       present in the file system.

				 Nov 15, 2012				DF(1M)
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