It's free. Just open the App Store app and type "xcode" into the search field. The latest build of Ubuntu, for 64-bit Arm: The Arm installer ISO isn't located on the main Ubuntu download site.

Canonical engineer Dimitri John Ledkov announced on Wednesday that Ubuntu does not plan to offer 32-bit ISO installation images for its new OS version starting with the next release — Ubuntu 17. ...

How to install Ubuntu on VirtualBox? To install Ubuntu on VirtualBox, users need to download the Ubuntu ISO file from its official website and create a new virtual machine. Once they are done, the ...