Load Alert Script for Server

1 . Login to the server as root

# vi /root/loadalert

2. And the below script
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#!/bin/bash
#Wednesday, December 06 2006
EMAIL="test@gmail.com"
EMAIL1="test@yahoo.com"
SUBJECT="$(hostname) load is"
TEMPFILE="/tmp/$(hostname)"
echo "Load average has crossed the limits..." >> $TEMPFILE
echo "Hostname: $(hostname)" >> $TEMPFILE
echo "Local Date & Time : $(date)" >> $TEMPFILE
echo "| Uptime status: |" >> $TEMPFILE
echo "------------------" >> $TEMPFILE
/usr/bin/uptime >> $TEMPFILE
echo "------------------" >> $TEMPFILE
echo "| Top 20 CPU consuming processes: |" >> $TEMPFILE
ps aux | head -1 >> $TEMPFILE
ps aux --no-headers | sort -rn +2 | head -20 >> $TEMPFILE
echo "| Top 10 memory-consuming processes: |" >> $TEMPFILE
ps aux --no-headers| sort -rn +3 | head >> $TEMPFILE
echo "---------------------------" >> $TEMPFILE
echo "| Memory and Swap status: |" >> $TEMPFILE
/usr/bin/free -m >> $TEMPFILE
echo "------------------------------" >> $TEMPFILE
echo "| Disk Space information: |" >> $TEMPFILE
echo "---------------------------" >> $TEMPFILE
/bin/df -h >> $TEMPFILE
echo "------THE END----------------" >> $TEMPFILE
L05="$(uptime|awk '{print $(NF-2)}'|cut -d. -f1)"
if test $L05 -gt 5
then
mail -s "$SUBJECT $L05" "$EMAIL" < $TEMPFILE
mail -s "$SUBJECT $L05" "$EMAIL1" < $TEMPFILE
fi
rm -f $TEMPFILE

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Change permission

3 . chmod +x /root/loadalert

4. Add cron

# vi /var/spool/cron/root

* * * * * /root/loadalert >/dev/null 2>&1

5. Restart Cron

# /etc/init.d/crond restart

6. Check cron log for error mesage...

# tail -f /var/log/cron