after my father got an old work notebook without windows preinstalled, i suggested trying ubuntu, his first contact with linux. installation went without proble

after my father got an old work notebook without windows preinstalled, i suggested trying ubuntu, his first contact with linux. installation went without problems and a few days later i asked him wheter everything was ok. he answered that everything was great, except for that "edgy desktop background of a skull" (he mentioned something about that being a typical linux hacker thing). it was the "intrepid ibex" version and the "skull" was actually a stylized ibex.