Linux From Scratch (LFS) is a project that provides you with step-by-step instructions for building your own customized Linux system entirely from source.
You may download the stable book in various formats from the stable book directory.
Android Studio 2.0 Preview is available to download in Canary Channel now. This video show how to download and run in Ubuntu (Ubuntu-GNOME 15.10 on VirtualBox/Windows 10), in parallel with existing installed Android Studio 1.5.
(reference: Android Developers Blog)
Related: - Download and run Android Studio 2.0 Preview on Windows 10
This video show how to download and run Android Studio 2.0 Preview from Canary Channel?, in parallel with existing installed Android Studio 1.5. (The Emulator is seem still the old version, not the New Android Emulator)
reference: Android Developers Blog announcement
Related: Install Android Studio 2.0 Preview on Ubuntu Linux, parallel with existing installed Android Studio