Linux in a Nutshell, Third Edition

Name

df

Synopsis

df [options] [name]

Description

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 1KB 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).

--block-size= n

Show space as n-byte blocks.

-h, --human-readable

Print sizes in a format friendly to human readers (e.g., 1.9G 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, --kilobytes

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 type filesystems.

-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. ...