How do I add a line of text to the middle of a file using bash?

Question

I\'m trying to add a line of text to the middle of a text file in a bash script. Specifically I\'m trying add a nameserver to my /etc/resolv.conf file. As it stands, resol

Answer 1

Assuming you want to insert immediately after the search line, this is much simpler:

sed -ie '/^search/a nameserver 127.0.0.1' filename

• -i : edit file in place
• -e : allows the execution of a script/commands inside sed expression
• a mynewtext : command that tells sed to insert the text mynewtext after matched pattern