Use the DF command to display disk usage and usage.

Use the "df-k" command to display disk usage and occupancy in K units.

[Email protected]:/tmp#df-k
Filesystem 1k-blocks used Available use% mounted on
Udev 16462548 16462536 1%/dev
TMPFS 3294808 572 3294236 1%/run
/dev/dm-0 107713536 9513064 92705896 10%/
None 4 0 4 0%/sys/fs/cgroup
None 5120 0 5120 0%/run/lock
None 16474036 0 16474036 0%/run/shm
None 102400 0 102400 0%/run/user
/DEV/SDA1 240972 42222 186309 19%/boot

Use the "df-m" command to display disk usage and occupancy in m units
[Email protected]:/tmp#df-m
Filesystem 1m-blocks used Available use% mounted on
Udev 16077 1 16077 1%/dev
TMPFS 3218 1 3218 1%/run
/dev/dm-0 105189 9291 90534 10%/
None 1 0 1 0%/sys/fs/cgroup
None 5 0 5 0%/run/lock
None 16088 0 16088 0%/run/shm
None 0 0%/run/user
/DEV/SDA1 236 182 19%/Boot

Use the DF command to display disk usage and usage.