Note
Replate your username & path constains rog-plymouth
-
sudo mv //home/{username}/Downloads/rog-plymouth /usr/share/plymouth/themes -
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/rog-plymouth/rog-plymouth.plymouth 100 -
sudo update-alternatives --config default.plymouth -
sudo update-initramfs -u