replace string

I have a text file with this format:

aaa:bbb:ccc
ddd:eee:fff
ggg:hhh:iii

so now i want to search for fff and replace it with kkk but in same file. i know how to do by pasting stuff in other file. but for this i need that to be in same file

any help will be appreciated

Thanks

Select ratingPoorOkayGoodGreatAwesome

No votes yet