Jan
02

#!/bin/bash
# Shell script to monitor running services such as web/http, ssh, mail etc.
# If service fails it will send an Email to ADMIN user
# ————————————————————————-
# See URL for more info
# http://www.indiangnu.org
# —————————————————
# service port
ports=”22 80 25″

# service names as per above ports
service=”SSH WEB MAIL”

# No of services to monitor as per (above ports+1)
SCOUNTER=4

#Email id to send alert
ADMINEMAIL=”ravi@indiangnu.org”

# counter
c=1
echo “Running services status:”

# use sudo if you want i.e. sudo /bin/netstat
/bin/netstat -tulpn | grep -vE ‘^Active|Proto’ | while read LINE
do
sendMail=0
# get active port name and use : as delimiter
t=$(echo $LINE | awk ‘{ print $4}’ | cut -d: -f2)
[ “$t” == “” ] && t=-1 || :
# get service name from $services and : as delimiter
sname=$(echo $service | cut -d’ ‘ -f$c)
sstatus=”$sname: No”
# now compare port
for i in $ports
do
if [ $i -eq $t ]; then
sstatus=”$sname: Ok”
sendMail=1
fi
done
# display service status as OK or NO
echo “$sstatus”
#next service please
c=$( expr $c + 1 )
[ “$sendMail” == “0” ] && echo $sstatus | mail -s “service down $sstatus” $ADMINEMAIL || :
# break afer 3 services
[ $c -ge $SCOUNTER ] && break || :
done

==========================

Thank you

Ravi Bhure

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