Bash MX record script

[aliahsan81]

I need a bash script for MX record monitoring It will be grate if some one provide me with ideas/small script.It will be grate.IF any one give me idea how we can it with dig nslookup or any other because the provide extra information

Thanks

[mikewu]

Not really sure what you mean by MX record monitoring. Some more specifics would be nice.

To look up the mx server of a site in general

nslookup -type=mx ip_addr/site_name

if you wanted that to repeat to a log, make an entry in crontab for it to repeat and redirect the output

#! /bin/sh

nslookup -type=mx ip_address >> /home/user/mx_log

Extra information and specifics will help us to provide you with more accurate and useful information.

[aliahsan81]

Thanks for your quick reply.I will provide details shortly

[aliahsan81]

Hi

That i want to do

I have file that contain all domain name.But i need to filter out these domain name because there is some extra info.So need help with sed and awk.And i am making script in bash.Below are the entries.




_ax_somename__info__Uptime_days 19 G 2009-02-17T14:36:12-05
_ax_xyz__info__Uptime_days 5 G 2009-02-17T14:35:07-05
_ax_test__info__Uptime_days 14 G 2009-02-17T14:36:06-05
_ax_hello__info__Uptime_days 20 G 2009-02-17T14:36:02-05


So what is need is only somename,xyz,test,hello.Need to use sed and awk.So kindly guide me.Then after i got these domain name then i will use dig or nslookup to check what ever there MX record is.

[aliahsan81]

Hi Again

I have figured out a way to do this but i am stuck on last thing you can help me now i am sure




cat data.txt | awk -F" " '{print $1 }' | sed 's/[ __info__Uptime_days ]*$//'



This will give me some thing like this


_ax_urname
_ax_123
_ax_test
_ax_hello




Last thing what i need is to remove _ax_ can any one do this with sed.

[ghostdog74]

no need to use that many tools. and don't use cat unnecessarily

# awk -F"_" '{print $3}' file
somename
xyz
test
hello

[digitalvectorz]

Why not just do another sed...

sed -i "/_ax_//"


Thus giving something like...

cat data.txt | awk -F" " '{print $1 }' | sed 's/[ __info__Uptime_days ]*$//' | sed -i 's/_ax_//'


Granted ghostdog does have a point...I was just continuing your thought process.

[ghostdog74]

Thus giving something like...

cat data.txt | awk -F" " '{print $1 }' | sed 's/[ __info__Uptime_days ]*$//' | sed -i 's/_ax_//'



awk does the job of tools such as sed/grep/cut/wc/ etc as it is a programming language by itself. lots of beginners doesn't know and use it only for one liners such as this.

[aliahsan81]

You All are very help full.I am very thank full to you all.That works like a dream.