Instead of using fbcon (the default, in-kernel framebuffer-based terminal emulator), use fbterm (a userspace framebuffer terminal emulator, which supports backgrounds) with fbv as specified in the fbterm man page.
It looks like there’s also a patch, fbcondecor, to add background support to fbcon, but it’s not in vanilla kernel.
how would they change their wallpaper if they only use cli?
Instead of using fbcon (the default, in-kernel framebuffer-based terminal emulator), use
fbterm(a userspace framebuffer terminal emulator, which supports backgrounds) withfbvas specified in thefbtermman page.It looks like there’s also a patch, fbcondecor, to add background support to fbcon, but it’s not in vanilla kernel.
You make one from ascii!