UNIX - df [disk space]

`df` - report filesystem disk space usage

USAGE
df [OPTION]... [FILE]...

The df command displays the amount of disk space occupied by mounted or unmounted file systems, the amount of used and available space, and how much of the file system's total
capacity has been used. The file system is specified by dev ice, or by referring to a file or directory on the specified file system.

Used without operands or options, df reports on all mounted file systems.

df may not be supported for all FSTypes.

If df is run on a networked mount point that the automounter has not yet mounted, the file system size will be reported as zero. As soon as the automounter mounts the file system,
the sizes will be reported correctly.

OPTIONS
Show information about the filesystem on which each FILE resides, or all filesystems by default.
Mandatory arguments to long options are mandatory for short options too.

-a, --all
include filesystems having 0 blocks

-B, --block-size=SIZE use SIZE-byte blocks

-h, --human-readable
print sizes in human readable format (e.g., 1K 234M 2G)

-H, --si
likewise, but use powers of 1000 not 1024

-i, --inodes
list inode information instead of block usage

-k like --block-size=1K

-l, --local
limit listing to local filesystems

--no-sync
do not invoke sync before getting usage info (default)

-P, --portability
use the POSIX output format

--sync invoke sync before getting usage info

-t, --type=TYPE
limit listing to filesystems of type TYPE

-T, --print-type
print filesystem type

-x, --exclude-type=TYPE
limit listing to filesystems not of type TYPE

-v (ignored)

--help display this help and exit

--version
output version information and exit

EXAMPLE