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DF(1) FreeBSD General Commands Manual DF(1)
NAME
df -- display free disk space
SYNOPSIS
df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type]
[file | filesystem ...]
DESCRIPTION
The df utility displays statistics about the amount of free disk space on
the specified file system or on the file system of which file is a part.
Values are displayed in 512-byte per block counts. If neither a file or
a file system operand is specified, statistics for all mounted file sys-
tems are displayed (subject to the -t option below).
The following options are available:
-a Show all mount points, including those that were mounted with the
MNT_IGNORE flag.
-b Use 512-byte blocks rather than the default. Note that this
overrides the BLOCKSIZE specification from the environment.
-c Display a grand total.
-g Use 1073741824-byte (1-Gbyte) blocks rather than the default.
Note that this overrides the BLOCKSIZE specification from the
environment.
-H "Human-readable" output. Use unit suffixes: Byte, Kilobyte,
Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
number of digits to four or fewer using base 10 for sizes.
-h "Human-readable" output. Use unit suffixes: Byte, Kilobyte,
Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
number of digits to four or fewer using base 2 for sizes.
-i Include statistics on the number of free inodes.
-k Use 1024-byte (1-Kbyte) blocks rather than the default. Note
that this overrides the BLOCKSIZE specification from the environ-
ment.
-l Only display information about locally-mounted file systems.
-m Use 1048576-byte (1-Mbyte) blocks rather than the default. Note
that this overrides the BLOCKSIZE specification from the environ-
ment.
-n Print out the previously obtained statistics from the file sys-
tems. This option should be used if it is possible that one or
more file systems are in a state such that they will not be able
to provide statistics without a long delay. When this option is
specified, df will not request new statistics from the file sys-
tems, but will respond with the possibly stale statistics that
were previously obtained.
-P Use POSIX compliant output of 512-byte blocks rather than the
default. Note that this overrides the BLOCKSIZE specification
from the environment.
-t Only print out statistics for file systems of the specified
types. More than one type may be specified in a comma separated
list. The list of file system types can be prefixed with ``no''
to specify the file system types for which action should not be
taken. For example, the df command:
df -t nonfs,nullfs
lists all file systems except those of type NFS and NULLFS. The
lsvfs(1) command can be used to find out the types of file sys-
tems that are available on the system.
ENVIRONMENT
BLOCKSIZE If the environment variable BLOCKSIZE is set, the block counts
will be displayed in units of that size block.
SEE ALSO
lsvfs(1), quota(1), fstatfs(2), getfsstat(2), statfs(2), getmntinfo(3),
fstab(5), mount(8), quot(8)
HISTORY
A df command appeared in Version 1 AT&T UNIX.
BUGS
The -n flag is ignored if a file or file system is specified. Also, if a
mount point is not accessible by the user, it is possible that the file
system information could be stale.
FreeBSD 6.2 April 22, 2004 FreeBSD 6.2
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 19 19:56:42 BST 2007
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