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 doesn't mean a 'mobile version' of Ubuntu. It means that after this installing 'Ubuntu for Android' you won't be able to use Ubuntu OS in your android tablet. Instead on connecting your tablet with your PC using and HDMI cable you'll be able to use the desktop version of Ubuntu. The image below clarifies this :
So I assume what you expect is the Ubuntu for Phones :The Mobile OS of Ubuntu.Ubuntu For Phones.
I don't think Galaxy Note is ready for dual boot.