Want to check your disk is full in Unix ???

oops! it happened again... unix machine says, disc is full...more precisely

write: journal: No space left on device

No probelm, command df can save our life.

df shows how much free space is available in each mount.

It has a list of options, and the man page says like

a, --all	include dummy file systems
-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 file systems
--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 file systems of type TYPE
-T, --print-type	print file system type
-x, --exclude-type=TYPE	limit listing to file systems not of type TYPE
--version	output version information and exit

But among them, i used df -h. it displays the result in easy to read format. like

Filesystem Size Used Avail Use% Mounted on
/dev/hda3 39G 2.8G 34G 8% /
/dev/hda1 99M 11M 83M 12% /boot
none 254M 0 254M 0% /dev/shm