I want to install a Ubuntu 18.04 environment on a USB. I only have one USB and can therefore not install the ISO image from Ubuntu on one USB and install it on the other USB (like done here).
I believe that the installer ISO for Desktop (found here) can be used as a full Ubuntu environment, but it removes all the changes after a restart and does not store it on the USB itself. Is it possible to disable this and keep the changes on the USB? Or is there an IMG/ISO file for an Ubuntu environment that can directly be written to a USB and doesn't require installing first (from a reputable source)?