df
Maintenance Commands df(1M)NAME
df - displays number of free disk blocks and filesSYNOPSIS
/usr/bin/df [ -F FSType ] [ -abegklntV ] [ -o FSType- specific_options ] [ block_device | directory | file | resource ... ] /usr/xpg4/bin/df [ -F FSType ] [ -abegklnPtV ] [ -o FSType-specific_options ] [ block_device | directory | file | resource ... ]DESCRIPTION
The df command 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 dev- ice, 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 Report on all file systems including ones whose entries in /etc/mnttab (see mnttab(4)) have the ignore option set. -b Print the total number of kilobytes free. -e Print only the number of files free. -F FSType Specify 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)) have the 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 Print the entire statvfs(2) structure. This option is SunOS 5.8 Last change: 18 Feb 1999 1 Maintenance Commands df(1M) used only for mounted file systems. It cannot be used with the -o option. This option overrides the -b, -e, -k, -n, -P, and -t options. -k Print the allocation in kbytes. The output consists of one line of information for each specified file sys- tem. 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 unpriviledged 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 Report on local file systems only. This option is used only for mounted file systems. It cannot be used with the -o option. -n Print 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 sys- tems. It cannot be used with the -o option. -o FSType-specific_options Specify FSType-specific options. These options are comma-separated, with no intervening spaces. See the manual page for the FSType-specific command for details. -t Print full listings with totals. This option overrides the -b, -e, and -n options. -V Echo the complete set of file system specific command lines, but do not execute them. The command line is generated by using the options and operands provided by the user and adding to them information derived from /etc/mnttab, /etc/vfstab, or /etc/default/fs. This option may be used to verify and validate the command line. /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
df interprets operands according to the following pre- cedence: block_device, directory, file. The following operands are supported: block_device SunOS 5.8 Last change: 18 Feb 1999 2 Maintenance Commands df(1M) 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: Writing Portable Information About the /usr File System Using the df Command. The following example writes portable information about the /usr file system: example% /usr/xpg4/bin/df -P /usr Example 2: Writing Portable Information About the /usr File System Using the df Command, When /usr/src is Part of the /usr 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 3: Using df to Display Inode Usage on All ufs File Systems 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. SunOS 5.8 Last change: 18 Feb 1999 3 Maintenance Commands df(1M) 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: 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 parti- tion for a command if no FSType is specified. /etc/mnttab" mount table /etc/vfstab" list of default parameters for each file systemATTRIBUTES
See attributes(5) for descriptions of the following attri- butes: /usr/bin/df ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | | Availability | SUNWcsu | |_____________________________|_____________________________| /usr/xpg4/bin/df ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | | Availability | SUNWxcu4 | |_____________________________|_____________________________|SEE ALSO
find(1), df_ufs(1M), mount(1M), statvfs(2), default_fs(4), mnttab(4), vfstab(4), attributes(5), environ(5), large- file(5), XPG4(5) SunOS 5.8 Last change: 18 Feb 1999 4 Maintenance Commands df(1M)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 5.8 Last change: 18 Feb 1999 5