The
df utility displays statistics about the amount of free disk space on the specified file system or on the file system of which file is a part. Values are displayed in 512-byte per block counts. If neither a file or a file system operand is specified, statistics for all mounted file systems are displayed.
Use
df -h to see the output "Human-readable" output. Uses unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte.
# df -h
Example:
# df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/ad4s1a 23G 2.8G 19G 13% /
devfs 1.0K 1.0K 0B 100% /dev
