Friday, 28 March 2014

Script for disc space alert in Linux


#!/bin/bash

#admin email account
ADMIN="mymailid@domain.com"

# set usage alert threshold
THRESHOLD=95

#hostname
HOSTNAME=$(hostname)

#mail client
MAIL=/bin/mail

# store all disk info here
EMAIL=""

for line in $(df -hP | egrep '^/dev/' | awk '{ print $6 "_:_" $5 }')
do

        part=$(echo "$line" | awk -F"_:_" '{ print $1 }')
        part_usage=$(echo "$line" | awk -F"_:_" '{ print $2 }' | cut -d'%' -f1 )

        if [ $part_usage -ge $THRESHOLD -a -z "$EMAIL" ];
        then
                EMAIL="$(date): Running out of diskspace on $HOSTNAME\n"
                EMAIL="$EMAIL\n$part ($part_usage%) >= (Threshold = $THRESHOLD%)"

        elif [ $part_usage -ge $THRESHOLD ];
        then
                EMAIL="$EMAIL\n$part ($part_usage%) >= (Threshold = $THRESHOLD%)"
        fi
done

if [ -n "$EMAIL" ];
then
        echo -e "$EMAIL" | $MAIL -s "Alert: Partition(s) almost out of diskspace on $HOSTNAME" "$ADMIN"
fi

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