+ example system unit file

+ own common tasks of prepared debian for make programs from source
+ ansible ssh port example

roles/common/tasks/main.yml

@@ -11,4 +11,8 @@
 
 # Add further tasks for the common role (applied to all servers) to this playbook...
 
-...
+- name: Install gnupg
+  shell: >-
+    apt-get update && 
+    apt-get install --no-install-recommends --no-install-suggests -y gnupg1 gnupg2 gnupg ca-certificates
+