df(1M)							  System Administration Commands						    df(1M)

NAME

       df - displays number of free disk blocks and free files

SYNOPSIS

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

       /usr/xpg4/bin/df [-F FSType] [-abeghklnPtVZ] [-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 systems.

       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 correctly.

OPTIONS

       The following options are supported for both /usr/bin/df and /usr/xpg4/bin/df:

       -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  matching 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 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. All sizes are scaled to a human readable format, 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.

       -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_optioSpecifies  FSType-specific  options.  These options are comma-separated, 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  gen-
			       erated by using the options and operands provided by the user and adding to them information derived from /etc/mnt-
			       tab, /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.

   /usr/bin/df
       The following option is supported for /usr/bin/df only:

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

		The output consists of one line of information for each file system.  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

   /usr/xpg4/bin/df
       The following option is supported for /usr/xpg4/bin/df only:

       -P	Same as -k except in 512-byte units.

OPERANDS

       The  df	utility  interprets operands according to the following precedence: block_device, directory, file. The following operands are sup-
       ported:

       block_device    Represents a block special device (for example, /dev/dsk/c1d0s7); the corresponding file system need not be mounted.

       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 encountering 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, /system/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/xpg4/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/xpg4/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 compatibility 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 specified.

       /etc/mnttab	       Mount table

       /etc/vfstab	       List of default parameters for each file system

ATTRIBUTES

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

   /usr/bin/df
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	       ATTRIBUTE	   |
       +-----------------------------+-----------------------------+
       |VALUE			     |				   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

   /usr/xpg4/bin/df
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWxcu4			   |
       +-----------------------------+-----------------------------+
       |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 a maximum of 64 Mbytes.

SunOS 5.10							    26 Oct 2004 							    df(1M)