adding a domain in /etc/resolv.conf

[laiju.c.babu]

Hi Gurus,

I required to add one domain to /etc/resolv.conf file in more that 50 servers. Remsh is already available from one of the server to all those 50 servers.

Hence  could you please help me how can i add one domain entry in /etc/resolv.conf file using one for loop.

Regards

[Dennis Handly]

What is the current content of resolv.conf what do you need to do, add a line to the end?

domain new-domain

[laiju.c.babu]

Hi Dennis,

For example

Current content of /etc/reolv.conf is

cat /etc/resolv.conf

domain aaa.com
nameserver  **********
nameserver **********
search   bcd.net

I want to add one more domain for searching for example xyz.net

That means after the modification /etc/resolv.conf will look like below

cat /etc/resolv.conf

domain aaa.com

nameserver  **********

nameserver **********

search   bcd.net  xyz.net

I have to add this xyz.net entry to /etc/resolv.conf file in more that 50 servers.

In our scenarion remsh is enabled to all these 50 servers. 

Regards

[Dennis Handly]

>to: search   bcd.net  xyz.net

Perhaps something like:

#!/usr/bin/ksh
# Changes search line in /etc/resolv.conf

for mach in $(< list-of-servers); do
   echo "Doing: $mach ================"
   remsh $mach "ex /etc/resolv.conf <<EOF

%s/search   bcd.net/search   bcd.net  xyz.net/
wq /etc/resolv.conf.new
EOF
"
done

If you are happy with the results of /etc/resolv.conf.new, you can leave that name out and it will write back to the original file.

[laiju.c.babu]

Hi Dennis,

In  the servers we have different entries  in /etc/resolv.conf.

for eg : some servers we have 

search abc.net def.net   and in some others we have search abc.net xyz.net  etc.

In this scenario can we use the script which you mentioned below.

Regards

[Dennis Handly]

>search abc.net def.net   and in some others we have search abc.net xyz.net  etc.

I assume in the latter case you don't need to make the change?

If you need to customize the editing, then it is better to make a script and send it to each machine, unless you have a common NFS mounted directory you can use.