I have used vim in Redhat 8, it is so colorful. unfortunately vim in ubuntu is monochorme. Can ubuntu's vim be as colorful as Rh's one? if yes, please tell me how?

There are packages avaiable to spruce up VIM. I know that I have it on my Gentoo install, but I don't know if there is a package aviable on Fedora that will do it for you automatically. Here is a page about doing it manually. Here is another page where you can download someone else's color schemes. Finally here is another thread with your exact problem. Hope all of those links helped some!

If you search google, there are many ways to make Vi colourful, enable mouse support, line numbering and just about everything you can think of. Basically, you create a file in your home directory called .vimrc, and add to it various options to make Vim behave as you want. You can download a copy of my Vimrc file Here.

You may already know this, but you can get a graphical version of Vim, called Gvim. You can install it using:
I think it is in the universe repository, so you need to enable that if you haven't already.

I hope this helps
--Ian