As you all know, Galaxy Tab ships with Google Android pre-installed. But, if you are an exiting person that likes to try other operating systems as well, you should definitely give Ubuntu a try and boy, it is running like a charm.
So what is required to install it? First, you need to root it with Busybox installed. Also, you will have to use the Android VNC Viewer and Terminal Emulator to get things running. In the end, you will able to boot Ubuntu without even booting into Android.
In the video given below, you will find the steps in order to install Ubuntu.
The only thing that I find tricky is to control the cursor.