Compare IP Address from nslookup and file

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# 1  
Old 08-18-2011
Compare IP Address from nslookup and file


I am trying to compare IP address of a server using nslookup with IP address in a file (serverlist). And if there is a difference in IP, it should send an email.
But there is some error in the pgm... Please help...


for server in `cat serverlist`
        old_ip=`cat serverlist | awk -F\; '{ print $2 }'`
        ser_name=`cat serverlist | awk 'BEGIN{ FS=";";RS = "\n\n" }{ print $1 }'`
        for j in "$ser_name\n"
        curr_ip=`nslookup $j | grep Address | sed -n '2p' | cut -d: -f2`
        for i in $old_ip
        if [ $curr_ip == $old_ip ]
                echo "IP is SAME"
                echo "IP is DIFFERENT"

<serverlist> file format;123.234.345.123;456.765.234.987

Last edited by Franklin52; 08-19-2011 at 04:16 PM.. Reason: Please use code tags for data and code samples, thank you
# 2  
Old 08-18-2011
are you getting an error when you run the script or the logic is wrong and it is not printing out what you want?
# 3  
Old 08-18-2011
$ ./

Output is wrong.....I dont have a difference in IP..
# 4  
Old 08-18-2011
Looks like there is a leading space when you "cut" that ip from nslookup, replace curr_ip with this:

curr_ip=`nslookup $j | grep Address | sed -n '2p' | cut -d: -f2|sed 's/^[ \t]*//'`

# 5  
Old 08-18-2011
still the same output...wrong one Smilie
# 6  
Old 08-18-2011
replace the following :

if [ $curr_ip == $old_ip ]


if [[ "$curr_ip" == "$old_ip" ]]

keep the above sed change intact.

if you still get wrong results, replace #!/usr/bin/ksh with #!/usr/bin/ksh -x to enable trace and post the trace output.
# 7  
Old 08-18-2011
I cannot separate the server name to nslookup.
while comparing in if [["new_ip" == "$old_ip"]]
it is taking both IP from the file to compare with new IP.

+ [[ 123.234.345.123 = 123.234.345.123
456.765.234.987 ]]
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