Ubuntu installer won't load?

Question

linux

Now Kubuntu is installed, you need to install ubuntu, created an image on a USB flash drive, restart the computer, set the boot priority to a USB flash drive, and kubuntu is loaded, who faced this problem, how did you solve it?

Answer 1

Kubuntu becomes Ubuntu and vice versa with a flick of the wrist
sudo apt-get install ubuntu-desktop
sudo apt-get --purge remove kubuntu-desktop
sudo apt-get autoremove
or
sudo apt-get install kubuntu-desktop
sudo apt-get --purge remove ubuntu-desktop
sudo apt-get autoremove
https://help.ubuntu.com/community/FromUbuntuToKubuntu
You can just do sudo apt-get install ubuntu-desktop and on the login screen choose whether to load "Kubuntu" or "Ubuntu" .
And about booting from a flash drive - it doesn’t matter which system is already installed - there are two options - either the flash drive is not bootable (including problems with secureboot), or the boot priority is incorrect.
Both are diagnosed and written on the screen during the boot process.