Shell script for File System monitoring

In a database environment or any server environment we need to monitor space usage of file system. Below shown is the usage of file system for my environment. 

[grid@rac1 ~]$ df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             1.4G     0  1.4G   0% /dev
tmpfs                1.4G     0  1.4G   0% /dev/shm
tmpfs                1.4G  9.5M  1.4G   1% /run
tmpfs                1.4G     0  1.4G   0% /sys/fs/cgroup
/dev/mapper/ol-root   30G   27G  3.4G  89% /
/dev/sda1            2.0G  234M  1.8G  12% /boot
SW                   932G  568G  364G  61% /media/sf_SW
tmpfs                271M   32K  271M   1% /run/user/54322
There are many ways to monitor the filesystem either using tools or scripts. Here we are going to write a schell script to monitor the file system. This script should be writen by DBA or OS administrator. The script is schedule to run for every 10 mins. 
[grid@rac1 ~]$ cat check_FS.sh
#######################################################################
#
# check_FS.sh
#
# Script for checking mountpoint space by passing threshold limit as argument
#
# TesDBAcadmy.com
#
#########################################################################
clear
echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
echo "Below file system exceeds $1%"
echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
for i in `df -P|grep -v "File"|tr -s " " "~"|cut -d"~" -f5|tr -s "%" " "`
do
if [ $i -gt $1 ]
then
x=`df -h|grep $i%`
echo $x  > /home/grid/check_FS.log
fi
done
echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
Here our threshold value is 10 and can be dynamically passed as parameter to the schell script. The filesystem which exceeds the threshold will be stored under /home/grid/check_FS.log. 
[grid@rac1 ~]$ ./check_FS.sh 10

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Below file system exceeds 10%
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/dev/mapper/ol-root 30G 27G 3.4G 89% /
/dev/sda1 2.0G 234M 1.8G 12% /boot
SW 932G 568G 364G 61% /media/sf_SW
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In cron you can specify as shown Below. 

[grid@rac1 ~]$ crontab -l
   */10 * * * * /home/grid/check_FS.sh 10 > /dev/null 2>&1

(Listener and Database Monitoring)