Boot messages hide

Maybe a very simple question:
How do I suppress all boot messages from the startup, including the login messages?

Connect to Volumio via SSH.

To hide the login prompt run

systemctl disable getty@tty1.service

To hide boot messages on Raspberry Pi run

sudo sed -i -e 's/console=tty1/console=tty3/g' /boot/cmdline.txt

Note that these steps have to be applied after each Volumio update.

Thank you very much