sudo mkdir -p /usr/share/plymouth/themes/earsSplash
sudo cp -r earsSplash/* /usr/share/plymouth/themes/earsSplash/

sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth \
    default.plymouth /usr/share/plymouth/themes/earsSplash/earsSplash.plymouth 100
sudo update-alternatives --config default.plymouth

sudo update-initramfs -u        # Debian/Ubuntu
# or: sudo dracut -f            # Fedora/RHEL