Regex that adds extension to my domain name

[egreg7]

I am trying to write a regex that adds extension to my domain name. For example google, I need a regex expression that will return www.google .com

[woodcock]

You can append like this:

... | rex field=YourFieldHere mode=sed "s/$/YourExtensionStringHere/"

Or like this:

... | eval YourFieldHere = YourFieldHere . "YourExtensionStringHere"

[richgalloway]

What does your raw data look like? In other words, please show us the text you want a regex string to match.