hi I am a user of Samsung Galaxy Note 10.1 and I just have seen an app "Ubuntu for Android" I have Android 4.1.2 in my Note. Please tell me if I am able to use both Ubuntu and android in the tablet(like a formatted desktop which can use various OS at a time) and if it is possible please try to tell me the process
First of all, Ubuntu for Android isn't a 'mobile version' of Ubuntu. ie, After installing 'Ubuntu for Android' you won't be able to use Ubuntu OS in your android tablet. What it does is on connecting your tablet with your PC using and HDMI cable you'll be able to use the desktop version of Ubuntu.ie Your still will be in Android. The image below clarifies this :
So I assume what you expect is the Ubuntu For Phones :The Mobile OS of Ubuntu.
I don't think Galaxy Note is ready for dual boot.