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- DF(1L) MISC. REFERENCE MANUAL PAGES DF(1L)
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- NAME
- df - summarize free disk space
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- SYNOPSIS
- df [-aikPv] [-t fstype] [--all] [--inodes] [--type fstype]
- [--kilobytes] [--portability] [path...]
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- DESCRIPTION
- This manual page documents the GNU version of df. df
- displays the amount of disk space available on the filesys-
- tem containing each argument pathname. If no pathnames are
- given, the space available on all currently mounted filesys-
- tems 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.
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- If an argument is the full pathname of a disk device node
- containing a mounted filesystem, df shows the space avail-
- able on that filesystem rather than on the filesystem con-
- taining the device node (which is always the root filesys-
- tem). This version of df can not show the space available
- on unmounted filesystems, because on most kinds of systems
- doing so requires very nonportable intimate knowledge of
- filesystem structures.
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- OPTIONS
- -_a, --_a_l_l
- Include in the listing filesystems that have 0 blocks,
- which are omitted by default. Such filesystems are
- typically special-purpose pseudo-filesystems, such as
- automounter entries. On some systems, filesystems of
- type ``ignore'' or ``auto'' are also omitted by default
- and included in the listing by this option.
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- -_i, --_i_n_o_d_e_s
- List inode usage information instead of block usage.
- An inode (short for ``index node'') is a special kind
- of disk block that contains information about a file,
- such as its owner, permissions, timestamps, and loca-
- tion on the disk.
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- -_k, --_k_i_l_o_b_y_t_e_s
- Print sizes in 1K blocks instead of 512-byte blocks.
- This overrides the environment variable
- POSIXLY_CORRECT.
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- -_P, --_p_o_r_t_a_b_i_l_i_t_y
- Use the POSIX output format. This is like the default
- format except that the information about each filesys-
- tem is always printed on exactly one line; a mount dev-
- ice is never put on a line by itself. This means that
- if the mount device name is more than 20 characters
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- DF(1L) MISC. REFERENCE MANUAL PAGES DF(1L)
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- long (as for some network mounts), the columns are
- misaligned.
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- -_t, --_t_y_p_e _f_s_t_y_p_e
- Limit the listing to filesystems of type _f_s_t_y_p_e. Mul-
- tiple filesystem types can be shown by giving multiple
- -_t options. By default, all filesystem types are
- listed.
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- -_v Ignored; for compatibility with System V versions of
- df.
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- The long-named options can be introduced with `+' as well as
- `--', for compatibility with previous releases. Eventually
- support for `+' will be removed, because it is incompatible
- with the POSIX.2 standard.
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