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).
Linux Commad 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 exit.
