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- ddddffff((((1111)))) ddddffff((((1111))))
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- NNNNAAAAMMMMEEEE
- df - report number of free disk blocks
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ddddffff [ ----bbbbeeeeffffhhhhiiiikkkkllllmmmmnnnnPPPPqqqqrrrrttttVVVV ] [ ----wwww fieldwidth ] [ ----FFFF FStype ] [ filesystem ...]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _d_f reports the number of total, used, and available disk blocks (one disk
- block equals 512 bytes) in filesystems. The _f_i_l_e_s_y_s_t_e_m argument is a
- device special file containing a disk filesystem, a mounted NFS
- filesystem of the form _h_o_s_t_n_a_m_e:_p_a_t_h_n_a_m_e, or any file, directory, or
- special node in a mounted filesystem. If no _f_i_l_e_s_y_s_t_e_m arguments are
- specified, _d_f reports on all mounted filesystems.
-
- The options to _d_f are:
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- ----bbbb Causes _d_f to report usage in 512-byte units, which is the default.
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- ----eeee Causes only the device and the number of free inodes to be printed.
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- ----FFFF _F_S_t_y_p_e
- Causes filesystems of types other than _F_S_t_y_p_e to be skipped.
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- ----ffff Normally, the free block information is gleaned from the
- filesystem's superblock. The ----ffff flag forces a scan of the free
- block list.
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- ----hhhh Causes _d_f to report usage in ``human'' blocks. Each size is
- converted to kilobytes, megabytes, gigabytes, or terabytes and
- printed with a postfix indicating the units. Units are in powers of
- two, i.e., a megabyte is 2 to the 20th. This option also affects the
- inode style listing.
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- ----iiii Reports the number and percentage of used inodes and the number of
- free inodes.
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- ----kkkk Causes _d_f to report usage in 1024-byte units.
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- ----llll Restricts the report to local disk filesystems only. This option is
- supported only with EFS and XFS filesystems.
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- ----mmmm Causes _d_f to report usage in 1048576-byte (megabyte) units. This
- option also affects the inode style listing.
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- ----nnnn Prints only the device name and filesystem type for each filesystem.
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- ----PPPP When both the ----PPPP and ----kkkk options are specified, the following header
- line will be written:
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- Filesystem 1024-blocks Used Available Capacity Mounted on
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- When the ----PPPP is specified without the ----kkkk option, the following header
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- PPPPaaaaggggeeee 1111
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- ddddffff((((1111)))) ddddffff((((1111))))
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- line will be written:
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- Filesystem 512-blocks Used Available Capacity Mounted on
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- ----qqqq Recognized but ignored. Provided for compatibility with previous
- releases.
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- ----rrrr For XFS filesystems, adds the realtime portion of the filesystem,
- which is normally excluded.
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- ----tttt Recognized but ignored. Provided for compatibility with previous
- releases.
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- ----VVVV Causes a command line to be constructed from the defaults and
- echoed. Additional arguments are ignored.
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- ----wwww _f_i_e_l_d_w_i_d_t_h
- Causes the width of the first field (the FFFFiiiilllleeeessssyyyysssstttteeeemmmm field) to be
- padded to that value. This allows control of the output, so that
- systems with long pathnames can still have columnar output. In
- earlier releases, this field was truncated, in an attempt to keep
- the output from wrapping on an 80 column display (which often failed
- anyway, except for very short mount point names). Now it is never
- truncated.
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- EEEEXXXXAAAAMMMMPPPPLLLLEEEESSSS
- To report usage in the root filesystem, use either of the following:
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- df /dev/root
- df /
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- Report on the filesystem containing the current directory:
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- df .
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- FFFFIIIILLLLEEEESSSS
- /etc/mtab
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- statfs(2), efs(4), xfs(4).
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- EEEENNNNVVVVIIIIRRRROOOONNNNMMMMEEEENNNNTTTT
- If the environment variable HHHHUUUUMMMMAAAANNNN____BBBBLLLLOOOOCCCCKKKKSSSS is set, it implies ----hhhh.
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- BBBBUUUUGGGGSSSS
- Free counts may be incorrect, with or without the ----ffff flag.
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- PPPPaaaaggggeeee 2222
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- ddddffff((((1111)))) ddddffff((((1111))))
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- NOTES
- In previous IRIX releases, usage was reported in 1024-byte units.
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- The interpretation of megabyte et al as 1,000,000 or 2^20 is a matter of
- debate. The current reasoning is that kbytes are 1024, so megabytes
- should be 1024*1024.
-
- The proc filesystem (normally mounted under /_p_r_o_c) is not printed by
- default, but can be explicitly specified. This filesystem consumes no
- actual disk space, but is an interface to the virtual space of running
- processes. The total and free blocks reported represent the total
- virtual memory (real memory plus swap space) present and the amount
- currently free, respectively.
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- The ----iiii option applied to filesystems of type nnnnffffssss reports a free inode
- count of 0. Future versions of NFS will support useful inode counts.
- For the pppprrrroooocccc filesystem type, ----iiii reports the number of active process
- slots in the _i_u_s_e column and the number of available slots in the _i_f_r_e_e
- column.
-
- For XFS filesystems, there is no way to see the space used by the log
- portion of the filesystem.
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- In earlier releases, _d_f silently right truncated long device names and
- NFS server pathnames. _d_f now left truncates, since the left portion is
- more likely to be non-unique than the right.
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- PPPPaaaaggggeeee 3333
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