Add sshd_google_authenticator.adoc

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sshd_google_authenticator.adoc

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+= PAM Google-Authenticator
+Installazione e configurazione modulo PAM Google-Authenticator
+:authors: Celestino Amoroso
+:docinfo: shared
+:encoding: utf-8
+:toc: right
+:toclevels: 4
+:toc-title: Indice Generale
+:icons: font
+:icon-set: fi
+:numbered:
+:table-caption: Tabella
+:figure-caption: Diagramma
+:docinfo1:
+:sectlinks:
+:sectanchors:
+:source-highlighter: rouge
+// :rouge-style: ThankfulEyes
+:rouge-style: gruvbox
+// :rouge-style: colorful
+//:rouge-style: monokay
+
+toc::[]
+
+== Modulo PAM Google-Authenticator
+*to-do* https://dev.to/ssd71/pam-and-using-google-authenticator-on-fedora-2plh[]