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Old 04-06-2011, 02:23 PM   #1
NetRock
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Question Add Line to a File ( 3rd line)


Hi...
going back to my earlier post "Last digit minus ONE", when i get a Ip addresse with minus 1 ($ip), i need to add the new Ip address ($ip) to resolv.conf of that system.
so from resolve.conf:
Code:
# /etc/resolv.conf .......
domain mydomain.ca
nameserver 11.21.36.98
nameserver 11.21.37.98
nameserver 11.21.38.98
I need to make it like:
Code:
# /etc/resolv.conf
domain mydomain.ca
nameserver $ip
nameserver 11.21.36.98
nameserver 11.21.37.98
nameserver 11.21.38.98
.........  ...........
.........  ...........
.........  ...........
tried with sed

Code:
sed 'nameserver $ip/domain/G' -f /etc/resolv.conf
but not able to get it.

any better way....
thanks
 
Old 04-06-2011, 02:32 PM   #2
corp769
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Registered: Apr 2005
Posts: 5,817

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You could do it like so:
Code:
cat /etc/resolv.conf | sed -e '3 i $ip' > /etc/resolv.conf.new
Of course you need to modify that.....
Hope that helps!

Cheers,

Josh
 
1 members found this post helpful.
Old 04-06-2011, 03:55 PM   #3
smoker
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I'm getting fed up with people referring to earlier posts without a link or summary.

Either summarise it or link to it. Don't assume we're following your every word !
 
Old 04-06-2011, 03:58 PM   #4
corp769
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Quote:
Originally Posted by smoker View Post
I'm getting fed up with people referring to earlier posts without a link or summary.

Either summarise it or link to it. Don't assume we're following your every word !
Who's that to?
 
Old 04-06-2011, 05:16 PM   #5
Ramurd
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Quote:
Originally Posted by corp769 View Post
Who's that to?
probably your OP

Quote:
going back to my earlier post "Last digit minus ONE",
 
Old 04-06-2011, 07:11 PM   #6
kurumi
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Quote:
Originally Posted by NetRock View Post

tried with sed

Code:
sed 'nameserver $ip/domain/G' -f /etc/resolv.conf
but not able to get it.

any better way....
thanks

use double quotes so that your $ip variable can be interpolated. Same to some of the answers posted.
 
Old 04-07-2011, 07:17 AM   #7
NetRock
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Thank you for your replies.
 
  


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