Shell Programming and Scripting

/dev/sda1              99M   21M   74M  22% /boot

/dev/sda3              20G   13G  6.2G  68% /

df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              20G   13G  6.2G  68% /
/dev/sda1              99M   21M   74M  22% /boot

cat diskspace1.sh

#!/bin/bash

export DBALIST="xyz@abc.com"

devnames="/dev/sda3 /dev/sda1 /oradata  /orabkup  /software /backup /patches"

for devname in $devnames
do
   p=`df -h $devname | grep -v ^File | awk '{printf ("%i", $4); }'`
   if [ $p -ge 30 ]
   then
      df -h $devname | mail -s "$devname is low on space" $DBALIST
   fi
done

$ df -h | grep % | sed 's,%,,g' | awk ' { if ($5>=30) {print $0} } ' > disk_chk_out
$ mailx -s "Disk Check > 30%" abc@xyz.com < disk_chk_out