disk space util warning email alert by using shell script

#vi diskspacealert.sh
#!/bin/bash
threshould=10
hostname=$(hostname)

for path in `/bin/df -h | grep -vE 'Filesystem|tmpfs' | awk '{print $5}'| sed 's/%//g'`
do
 if [ $path -ge $threshould ]; then
 df -h | grep $path% >> /tmp/temp
 fi
done

value=`cat /tmp/temp | wc -l`
 if [ $value -ge 1 ]; then
 echo "your storage is critical cat /tmp/temp" | mail -v -s "$hostname disk is critical" boobxxxxxxxxxx@gmail.com
 fi
#rm -rf /tmp/temp







#sh diskspacealert.sh
.
.
.
//you will get a mail alert if your server have greater then 10%



//and before that make sure you were been configured any relay mail service like sendmail,ssmtp,mailx,postfix..