Shell Programming and Scripting

Hi -

I would like to send an e-mail alerts if in the output below capacity reaches to 80% and 90%

df -k /d500/oracle /d905/oracle /d805/oracle /d705/oracle
Filesystem kbytes used avail capacity Mounted on
/dev/vx/dsk/abcde_raid5_db/d500
52428800 24994408 27221040 48% /d500/oracle
/dev/vx/dsk/abcde_raid5_db/d905
41943040 16203832 25538992 39% /d905/oracle
/dev/vx/dsk/abcde_raid5_db/d805
20971520 10527896 10362888 51% /d805/oracle
/dev/vx/dsk/abcde_raid10/d705
41871360 4102520 37474800 10% /d705/oracle

How to do this in Shell script ?
Thanks in advance

some clues for you

Code:

df -k /d500/oracle /d905/oracle /d805/oracle /d705/oracle |sed '/^\//{N;s/\n//};s/%//' |awk '$4>50 && $4<90 && NR>1'

/dev/vx/dsk/abcde_raid5_db/d80520971520 10527896 10362888 51 /d805/oracle