Update..

roles/common/tasks/basic.yml

@@ -70,3 +70,32 @@
   tags:
     - limits-conf
 
+# - /etc/hosts
+
+- name: (basic.yml) Check file '/etc/hosts.ORIG' exists
+  stat:
+    path: /etc/hosts.ORIG
+  register: etc_hosts_ORIG
+  when:
+    - "groups['file_server']|string is search(inventory_hostname)"
+  tags:
+    - etc_hosts
+
+- name: (basic.yml) Backup installation version of file '/etc/hosts'
+  command: cp -a /etc/hosts /etc/hosts.ORIG
+  when: 
+    - "groups['file_server']|string is search(inventory_hostname)"
+    - etc_hosts_ORIG.stat.exists == False
+  tags:
+    - etc_hosts
+
+- name: (basic.yml) addjust '/etc/hosts' add nis-server ..
+  lineinfile:
+    path: /etc/hosts
+    regexp: '^192\.168\.82\.'
+    line: '{{ nis_server_address }} {{ nis_server_name }} {{ nis_server_name.split(".")[0] }}'
+  when:
+    - "groups['nis_server']|string is search(inventory_hostname)"
+  tags:
+    - etc_hosts
+