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NAME

df - display free disk space

CONTENTS

Synopsis
Description
Environment
See Also
History
Bugs

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 systems 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 environment.
-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 environment.
-n Print out the previously obtained statistics from the file systems. 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 systems, 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 systems 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

BUGS


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