df(diskfree)

功能說明：顯示磁盤的相關(guān)信息。

語法：df[-ahHiklmPT][--block-size=<區(qū)塊大小>][-t<文件系統(tǒng)類型>][-x<文件系統(tǒng)類型>][--help][--no-sync][--sync][--version][文件或設(shè)備]

補(bǔ)充說明：df可顯示磁盤的文件系統(tǒng)與使用情形。

參數(shù)：

-a或--all包含全部的文件系統(tǒng)。

--block-size=<區(qū)塊大小>以指定的區(qū)塊大小來顯示區(qū)塊數(shù)目。

-h或--human-readable以可讀性較高的方式來顯示信息。

-H或--si與-h參數(shù)相同，但在計(jì)算時(shí)是以1000Bytes為換算單位而非1024Bytes。

-i或--inodes顯示inode的信息。

-k或--kilobytes指定區(qū)塊大小為1024字節(jié)。

-l或--local僅顯示本地端的文件系統(tǒng)。

-m或--megabytes指定區(qū)塊大小為1048576字節(jié)。

--no-sync在取得磁盤使用信息前，不要執(zhí)行sync指令，此為預(yù)設(shè)值。

-P或--portability使用POSIX的輸出格式。

--sync在取得磁盤使用信息前，先執(zhí)行sync指令。

-t<文件系統(tǒng)類型>或--type=<文件系統(tǒng)類型>僅顯示指定文件系統(tǒng)類型的磁盤信息。

-T或--print-type顯示文件系統(tǒng)的類型。

-x<文件系統(tǒng)類型>或--exclude-type=<文件系統(tǒng)類型>不要顯示指定文件系統(tǒng)類型的磁盤信息。

--help顯示幫助。

--version顯示版本信息。

[文件或設(shè)備]指定磁盤設(shè)備。

#p#

NAME

df - report filesystem disk space usage  

SYNOPSIS

df [OPTION]... [FILE]...  

DESCRIPTION

This manual page documents the GNU version of df. df displays the amount of disk space available on the filesystem containing each file name argument. If no file name is given, the space available on all currently mounted filesystems is shown. Disk space is shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.

If an argument is the absolute file name of a disk device node containing a mounted filesystem, df shows the space available on that filesystem rather than on the filesystem containing the device node (which is always the root filesystem). This version of df cannot show the space available on unmounted filesystems, because on most kinds of systems doing so requires very nonportable intimate knowledge of filesystem structures.  

OPTIONS

Show information about the filesystem on which each FILE resides, or all filesystems by default.

Mandatory arguments to long options are mandatory for short options too.

-a, --all

include filesystems having 0 blocks

-B, --block-size=SIZE use SIZE-byte blocks

-h, --human-readable

print sizes in human readable format (e.g., 1K 234M 2G)

-H, --si

likewise, but use powers of 1000 not 1024

-i, --inodes

list inode information instead of block usage

-k

like --block-size=1K

-l, --local

limit listing to local filesystems

--no-sync

do not invoke sync before getting usage info (default)

-P, --portability

use the POSIX output format

--sync

invoke sync before getting usage info

-t, --type=TYPE

limit listing to filesystems of type TYPE

-T, --print-type

print filesystem type

-x, --exclude-type=TYPE

limit listing to filesystems not of type TYPE

-v

(ignored)

--help

display this help and exit

--version

output version information and exit

SIZE may be (or may be an integer optionally followed by) one of following: kB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.  

AUTHOR

Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.  

REPORTING BUGS

Report bugs to <bug-coreutils@gnu.org>.  

COPYRIGHT

Copyright © 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

SEE ALSO

The full documentation for df is maintained as a Texinfo manual. If the info and df programs are properly installed at your site, the command

info coreutils df

should give you access to the complete manual.