This document discusses KIWI, a command line tool for building Linux images. KIWI can be used to build images in various formats, including ISO, live CD/DVD, hard disk, USB, and cloud formats. The document outlines the KIWI workflow, which involves creating a folder with a KIWI description file and using KIWI to build images from the command line. KIWI supports building ISO and raw images and can be used along with openSUSE to customize and distribute customized Linux images.