Device drivers built into the kernel are frequently well-supported, and we also have proprietary drivers available from the manufacturer. Since neither Touch nor a full-featured desktop Ubuntu is supported by most of the manufacturers it is not possible to run.
Of course, if you have the new Samsung S8 then you can try using DeX — though that requires an external monitor until someone figures out a hack at least. This will take a little while but will install the entire Linux distro on your device. So, without further ado…. Phones with Android N and up have multiscreen functionality but really I need a full desktop environment to get properly into my workflow.
If those answers do not fully address your question, please ask a new question. There are plenty more but that should be enough to get you started. Alternatively, consider purchasing one of the supported devices listed below if waiting is too much.
These are devices that have ports in some way by either Canonical and the official Ubuntu Touch development team, or the Ubuntu community at large. There's also a Dual Boot app in Ubuntu for switching back to Android if you prefer.
Not all devices on the supported list at the UBports website are going to work with the flashing tool. This is usually performed by holding down the power button for about ten seconds.
Obviously, KBOX is not a replacement for a full-blown Linux distribution, but it can be useful in certain situations. Lastly, UBports supports Legacy devices.
Installing a regular Linux distribution on an Android device opens a whole new world of possibilities. My favorite is Multiscreen Multitasking seeing as I made it… This is an app that builds lots of small utilities into a single app and then puts them inside draggable windows. Not all software works though and unfortunately the fact that you need an Intel processor is going to be a limiting factor for most users.
Now hit the small download button on the top or bottom right of the screen. One day, I intend on rebuilding this app with full Docx support, sheets and a nicer UI.
The in-OS command prompt app does not work.