Newbie Issues - Trouble Installin on Clean Debian

OS type and version Debian 11.7.0
Webmin version Latest


Sorry for such a newbie question. I’m having an issue installing Webmin. I’ve read several guides on the web including the main installation page with the curl command. However when I run the command I am constantly being told that ‘’ is not trusted and the certificate doesn’t have a known issuer.

This comes from trying the official installation method and also via different method shown howtoforge.

Both have issues installing the gpg key as well it seems.

Any help appreciated. This is only for a hobby server and educating myself so not the end of the world. My knowledge doesn’t go that far as to explain how to fix the error.

Many thanks


do they match here

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