I am going to be making games with a few people to help me out. I would appreciate help in any way.
For example, how does one download and use unity using Ubuntu?
You don’t. The Unity editor only has Windows and Mac versions.
Also, in general, you’ll find it much easier to get help if you actually make the topic title descriptive. Virtually every single thread in several forums could be titled “Help Please” if they wanted to.
One does not!
One takes his time machine and moves forward in time to 20XX, when Unity will have the Linux editor port done.
(Replace XX with a two-digit number).
You just doomed it to be completed in 2100. 
–Eric
Then I must be from the future!!
Look! Unity running in Ubuntu !
Jokes aside, to answer your question - No, “Unity” IDE (Integrated development environment) does not directly support Linux platform yet. You cannot directly run Unity IDE on Linux. But you can export your game to Linux now though with Unity 4.0.
But if you MUST use Linux to run Unity IDE - there is a way - and that is to use virtual machine (VM) softwares - eg. using VirtualBox on Ubuntu and run either Windows XP/Vista/7 or OSX as Guest OS. Then you can install Unity IDE on the Guest OS and run it.
…simply install Unity on Ubuntu.
I’m sorry I couldn’t help myself.
Someone will disregard the quote, and get the wrong impression of that post… I promise.
It is possible through Wine.
It doesn’t really work with WINE currently.
–Eric
I thought somebody here on the forums got it running pretty well through WINE. Not perfectly of course, but still pretty well.
Same here.
Only old versions, nothing past 3.0 or so as far as I remember.
–Eric
@TylerPerry A giant picture of Boromir might have helped.