added some ansible playbooks for experiments

ansible-playbooks/ls-on-all.yml

@@ -0,0 +1,17 @@
+- hosts: all
+  remote_user: hyung-hwan
+  tasks:
+    - name: run ls
+      shell: ls -laF /etc
+      register: out
+
+#    - name: print result
+#      debug: 
+#        msg: "xxx: {{ out.stdout }}"
+
+
+    - name: print result
+      debug: 
+        msg: "xxx: {{ item }}"
+      loop:  "{{ out.stdout_lines }}"
+