DF(1)

NAME
df - summarize free disk space

SYNOPSIS
df [-abkmhiTPv?] [-t type] [-x type] [path]
df [--version, --help, --bytes, --posix, --kilobytes, --megabytes, --human-readable, --inodes, --all, --print-type, --help, --version] [---type TYPE] [--exclude TYPE] [path]

DESCRIPTION
Df shows the amount of disk space available on the filesystem containing each file name argument (or all the filesystems, if no such arguments are supplied.) Disk space is shown in 512 byte blocks by default.

OPTIONS

-a, --all
Show all filesystems, including those (like the
    proc filesystem) that have zero blocks.

-b, --bytes
Show disk space in bytes.

-k, --kilobytes.
Show disk space in 1024-byte blocks.

-m, --megabytes
Show disk space in megabytes (1048576 bytes).

-h, --human-readable
Show disk space in a somewhat friendlier fashion.  If the space
    is less than a megabyte, it will be given in kilobytes; if the space is gigabyte or less, it will be given in megabytes, and if it is larger than a gigabyte, it will be given in gigabytes.

-i, --inodes
Show inode usage, not disk space.

-T, --print-type
Print the type of each filesystem.

-P, --posix
Show disk space in 512-byte blocks.  This is the default output
    format, but the option exists in case the output format changes in the future.

-h, --help
Give a help message, then exit.

-t, --type
Show only filesystems of the given type.  You may specify multiple
    types with successive -t arguments.

-x, --exclude
Exclude filesystems of the given type.  You may exclude multiple
    types with successive -x arguments.

-V, --version
Show the version of this copy of
    df, then exit.

FILES
/etc/mnttab -- The list of mounted filesystems. /proc/mounts -- the kernel's list of mounted filesystems. It is identical to /etc/mtab, except that it mounts the root filesystem as /dev/root, and that it's otherwise guaranteed to be accurate as long as the /proc filesystem is mounted. Df uses /etc/mnttab to get the list of mounted filesystems, but if that file does not exist, it falls back to /proc/mounts before failing.

AUTHOR
David Parsons ( orc@pell.chi.il.us )