Also, this has been possible since basically the first version of Android: http://www.saurik.com/id/10 . It's just a chroot jail, taking advantage of the fact that there are ARM versons of Debian/Ubuntu. Complete Linux Installer and other similar apps are nice because they save you the trouble of remembering a bunch of commands or downloading and running a script, but even they are doing nothing besides downloading an image and running a script.
This is far from a usable experience. Notably, Android doesn't have an X server so you have to use VNC to get a GUI so a GUI is effectively useless. It's kind of handy to have proper GNU userland instead of Busybox sometimes and you can do silly things like run a local webserver and edit files using Emacs/vim/etc, but unless you're on a tablet with a keyboard attached somehow it's not practical at all. This has no relation to Ubuntu's efforts to make a proper port of Ubuntu to phones.
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Also, this has been possible since basically the first version of Android: http://www.saurik.com/id/10 . It's just a chroot jail, taking advantage of the fact that there are ARM versons of Debian/Ubuntu. Complete Linux Installer and other similar apps are nice because they save you the trouble of remembering a bunch of commands or downloading and running a script, but even they are doing nothing besides downloading an image and running a script.
This is far from a usable experience. Notably, Android doesn't have an X server so you have to use VNC to get a GUI so a GUI is effectively useless. It's kind of handy to have proper GNU userland instead of Busybox sometimes and you can do silly things like run a local webserver and edit files using Emacs/vim/etc, but unless you're on a tablet with a keyboard attached somehow it's not practical at all. This has no relation to Ubuntu's efforts to make a proper port of Ubuntu to phones.