Each supported Armbian image can be made from scratch – from latest kernel and u-boot sources, updated upstream packages and our most recent bug fixes and improvements. Supported build environment for SDK is Ubuntu Hirsute 21.04 x64 but you can run it containerised virtually on any X64 based Linux distribution under Docker. You can re-make live bootable image or just a kernel+dtb(hardware configuration) package which you transfer to your image and install with:
dpkg -i linux-image-[branch]-family.deb linux-dtb-[branch]-family.deb. In that process you can enforce many customisation. To the kernel or user space. Read more.
* Specifications differ from hardware revision, model and software support level