From #3447, I see that qubes-dom0-update is being phased out and will be finally replaced with qubesctl. Hence, I’m trying to practice using qubesctl for all my actions.
I’m trying to update Whonix to version 16 following this guide. It instructs me to use the following command to download templates for Whonix 16.
I want to use the equivalent version of qubesctl, but Google doesn’t return anything relating to installing new templates with qubesctl, and I don’t know how to do it.
You will have to do it the way it is described in the Whonix documentation. I vaguely remember that with R4.0 and Whonix-15 everything could be installed with one qubesctl command (which in turn invoked qubes-dom0-update). Whonix 16 install instructions do not have this option and there is probably a reason for it.