Display free disk space.
With no arguments, 'df' reports the space used and available on all currently
mounted filesystems (of all types). Otherwise, 'df' reports on the filesystem
containing each argument file.
Syntax
df [-b | -h | -H | -k | -m | -P] [-ailn] [-t type]
[file | filesystem ...]
Options
-a Show all mount points, including those that were mounted with the
MNT_IGNORE flag.
-b Use 512-byte blocks rather than the default. Note that this
overrides the BLOCKSIZE specification from the environment.
-g Use 1073741824-byte (1-Gbyte) blocks rather than the default.
Note that this overrides the BLOCKSIZE specification from the
environment.
-H "Human-readable" output. Use unit suffixes: Byte, Kilobyte,
Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
number of digits to three or less using base 10 for sizes.
-h "Human-readable" output. Use unit suffixes: Byte, Kilobyte,
Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
number of digits to three or less using base 2 for sizes.
-i Include statistics on the number of free inodes.
-k Use 1024-byte (1-Kbyte) blocks rather than the default. Note
that this overrides the BLOCKSIZE specification from the environment.
-l Only display information about locally-mounted filesystems.
-m Use 1048576-byte (1-Mbyte) blocks rather than the default. Note
that this overrides the BLOCKSIZE specification from the environment.
-n Print out the previously obtained statistics from the filesystems.
This option should be used if it is possible that one or
more filesystems are in a state such that they will not be able
to provide statistics without a long delay. When this option is
specified, df will not request new statistics from the filesystems,
but will respond with the possibly stale statistics that
were previously obtained.
-P Use POSIX compliant output of 512-byte blocks rather than the
default. Note that this overrides the BLOCKSIZE specification
from the environment.
-t Only print out statistics for filesystems of the specified types.
More than one type can be specified in a comma separated list.
The list of filesystem types can be prefixed with `no' to specify
the filesystem types for which action should not be taken.
For example, the df command:
df -t nonfs,mfs
lists all filesystems except those of type NFS and MFS. The
lsvfs(1) command can be used to find out the types of filesystems
that are available on the system.
Display free disk space for the data volume:
$ df /System/Volumes/data
“A prediction is worth twenty explanations” ~ K. Brecher
quota - Display disk usage and limits.