在bash中的行号上插入文本后面的文本

Question

I'm trying to add a master dns ip address in the named.conf file located on line 11. The text on this line is:

listen-on port 53 {127.0.0.1; }

I want to add the ipaddress after; to make:

listen-on port 53 {127.0.0.1; ipaddress; }

How would i do such a thing with sed or awk on line 11?

Answer 1

You can use this sed ,

sed '11s/}[ ]*$/ip_address;}/' named.conf

To do the in-place edit:

sed -i '11s/}[ ]*$/ip_address}/' named.conf