I have bad news for all of you. Turris Shield is intended for very unexpreienced users and that is also reflected in GUI. There are even some more advanced Foris configurations that were intentionally hidden. Absence of Luci is intentional and although it somehow slipped to image it is going to be removed with subsequent updates.
It is also not supported to use SSH. We appreaciate your interest but we do not ensure smooth update with changes done with SSH. SSH is there primarily for debugging purposes and not expected to be used by end user. You can do what ever you want with device you bought of course but support is going to be very limited in case of Shield with manual intervention.
In general you should buy Turris Mox to get Luci and more. Turris Shield is weaker hardware compared to Mox and is intended to serve as very simple router/firewall with Turris Sentinel and higher reliability.
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