Question

I have this file containing following text.

200.200.200.253
80/tcp:filtered:http
443/tcp:filtered:https

200.200.200.254
80/tcp:filtered:http
443/tcp:filtered:https

web.example.com (200.200.200.250)
80/tcp:filtered:http
443/tcp:filtered:https

I want to use sed to add (:) in end of the IP addresses. so it will look like following.

 200.200.200.253 :
 80/tcp:filtered:http
 443/tcp:filtered:https

 200.200.200.254 :
 80/tcp:filtered:http
 443/tcp:filtered:https

 web.example.com (200.200.200.250) :
 80/tcp:filtered:http
 443/tcp:filtered:https

I am having issue with web.example.com (200.200.200.250) regex match.

I want this line look like web.example.com (200.200.200.250) :

---

I got answer this is what i tried.

 sed -e 's/[0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}/&:/' file.txt

Answer 1

I suggest you to use

sed -r 's/^([0-9]+\.){3}[0-9]+$/& :/g' filename

sed -r 's/([0-9]+\.){3}[0-9]+.*/& :/g' filename