Load Alert Script for Server

The following script will send a mail to the email address mentioned, if the server load goes above 5. The mail will contain the top 10 cpu consuming processes, memory consuming processes, memory and swap status, disk space information and the uptime.

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

-----------------------------------
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

Thanks
Nobs