topic Re: shell script in Operating System - Linux

shell script

Shivkumar — Tue, 27 Sep 2005 00:44:11 GMT

Dear Sirs;

I need to know a shell script which does a nslookup on the names abc.xx.com and xyz.ab.com every 10 minutes and records the output in a file.

Please suggest the script.

Thanks,
Shiv

Re: shell script

Muthukumar_5 — Tue, 27 Sep 2005 00:51:51 GMT

#!/bin/ksh
# User input
LOGFILE=/tmp/nslookup.log
host1=abc.xx.com
host2=xyz.ab.com
stime=600

while [ 1 ]
do
nslookup -q $host1>> $LOGFILE
nslookup -q $host2 >> $LOGFILE
sleep $stime
done

exit 0
# END #

It will update in to /tmp/nslookup.log. You can change user inputs.

# Running script
# chmod u+x script.ksh
# ./script.ksh &
# tail -f /tmp/nslookup.log

hth.

Re: shell script

VEL_1 — Tue, 27 Sep 2005 00:52:12 GMT

Hi,

Use the following script.

hosts="abc.xx.com xyz.ab.com"

i=1
while [ $i -eq 1 ]
do
for str in $hosts
do
nslookup $str >>output_file 2>&1
if [ $? -ne 0 ]
then
echo "There is problem while nslookup $str" >>output_file 2>&1
i=0
fi
done
sleep 10
done

Re: shell script

Muthukumar_5 — Tue, 27 Sep 2005 00:55:30 GMT

You can setup cron + script also as,

#!/bin/ksh
# User input
# script.ksh
LOGFILE=/tmp/nslookup.log
ERRLOG=/tmp/nslookup.err
host1=abc.xx.com
host2=xyz.ab.com

touch $ERRLOG $LOGFILE
nslookup -q $host1>> $LOGFILE 2>>$ERRLOG
nslookup -q $host2 >> $LOGFILE 2>>$ERRLOG

exit 0
# END #

# Crontab Setting
0,10,20,30,40,50 * * * * /tmp/script.ksh 1>/dev/null 2>&1

hth.

Re: shell script

Yogeeraj_1 — Tue, 27 Sep 2005 01:33:46 GMT

hi,

you can also have a look at Openview products for some advance monitoring and notification features... however, you will have to pay for this.

kind regards
yogeeraj