名字
df - 报告文件系统磁盘空间的使用情况
总览
df [OPTION]... [FILE]...
POSIX 选项: [-kP]
GNU 选项 (最短方式): [-ahHiklmPv] [-t fstype] [-x fstype] [--block-size=size] [--print-type] [--no-sync] [--sync] [--help] [--version] [--]
描述
此手册页文档是df的GNU版本. df命令列出指定的每一个文件名所在的文件系统上可用磁盘空间的数量。如果没有指定文件名,则显示当前所有使用中的文件系统.缺省设置时, 磁盘空间以1K为一块显示,如果环境变量POSIXLY_CORRECT已设置,则采用512字节为一块显示. 如果参数是一个包含已使用文件系统的磁盘设备名, df命令显示出的是该文件系统的可用空间,而非包含设备结点的文件系统(只能是根文件系统).此版本的df不能显示未使用文件系统的可用空间,这是由于大多数系统在响应这样的请求时必须很清楚该文件系统的结构.
GNU 参数说明
- -a, --all
- 列出包括BLOCK为0的文件系统
- --block-size=SIZE use SIZE-byte blocks
- 指定块的大小
- -h,--huma-readable
- 用常见的格式显示出大小(例如:1K 234M 2G)
- -H,--si
- 同上,但是这里的1k等于1000字节而不是1024字节
- -i, --inodes
- 用信息索引点代替块表示使用状况
- -k, --kilobytes
- 指定块大小等于1024字节来显示使用状况
- -l, --local
- 只显示本地文件系统使用状况
- -m, --megabytes
- 以指定块大小等于1048576字节(1M)来显示使用状况
- --no-sync
- 在取得使用信息前禁止调用同步 (default)
- -P, --portability
- 使用POSIX格式输出
- --sync
- 在取得使用信息前调用同步
- -t, --type=TYPE
- 只显示指定类型(TYPE)的文件系统
- -T, --print-type
- 输出每个文件系统的类型
- -x, --exclude-type=TYPE
- 只显示指定类型(TYPE)之外的文件系统.
- -v (忽略)
- --
- 输出该命令的帮助信息并退出
- --version
- 输出版本信息并退出
作者
由 Torbjorn Granlund, David MacKenzie, Larry McVoy, 和 Paul Eggert 写作．
#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.
