Linux in a Nutshell, 6th Edition

Name

df

Synopsis

df [options] [name]

Report the amount of free disk space available on all mounted filesystems or on the given name. (df cannot report on unmounted filesystems.) Disk space is shown in 1 KB blocks (default) or 512-byte blocks if the environment variable POSIXLY_CORRECT is set. name can be a device name (e.g., /dev/hd*), the directory name of a mounting point (e.g., /usr), or a directory name (in which case df reports on the entire filesystem in which that directory is mounted).

Options

-a, --all

Include empty filesystems (those with 0 blocks).

-B n, --block-size=n

Show space as n-byte blocks.

-h, --human-readable

Print sizes in a format friendly to human readers (e.g., 1.9 MB instead of 1967156).

-H, --si

Like -h, but show as power of 1000 rather than 1024.

-i, --inodes

Report free, used, and percent-used inodes.

-k

Print sizes in kilobytes.

-l, --local

Show local filesystems only.

-m, --megabytes

Print sizes in megabytes.

--no-sync

Show results without invoking sync first (i.e., without flushing the buffers). This is the default.

-P, --portability

Use POSIX output format (i.e., print information about each filesystem on exactly one line).

--sync

Invoke sync (flush buffers) before getting and showing sizes.

-t type, --type=type

Show only filesystems of the specified type.

-T, --print-type

Print the type of each filesystem in addition to the sizes.

-x type, --exclude-type=type

Show only filesystems that are not of type type.

--help

Print help message and then exit.

--version

Print the version and then ...