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- DF(1L) DF(1L)
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- NAME
- df - summarize free disk space
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- SYNOPSIS
- df [-aikP] [-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 POSIX_ME_HARDER 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 almost always the root
- filesystem). 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
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- -_✓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.
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- -_✓i, +_✓i_✓n_✓o_✓d_✓e_✓s
- List inode usage information instead of block usage.
- An inode is a special kind of disk block that contains
- information about a file, such as its owner, permis-
- sions, timestamps, and location 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
- POSIX_ME_HARDER.
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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
- long (as for some network mounts), the columns are
- misaligned.
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- DF(1L) DF(1L)
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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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