--- a/ansible.rst	Sun Oct 25 01:19:24 2020 +0300
+++ b/ansible.rst	Mon Oct 26 12:51:23 2020 +0200
@@ -17,6 +17,14 @@
 
   ansible -vvvv ...
 
+Print variable value with task ``debug``::
+
+  - debug: var=ansible_host
+  - debug:
+      var: ansible_host
+  - debug:
+      msg: "host is {{ ansible_host }}"
+
 To debug Python modules set ``ANSIBLE_KEEP_REMOTE_FILES`` to ``1`` (it causes Ansible to leave the
 exact copy of the Python scripts it executed on the target machine)::
 
@@ -98,6 +106,16 @@
 Files, templates, variables definitions are looked in ``files``, ``templates``, ``vars`` role / play
 directories first, then in the base directory for role / play.
 
+https://docs.ansible.com/ansible/latest/user_guide/intro_inventory.html
+  You can also add ``group_vars/`` and ``host_vars/`` directories to your playbook
+  directory. The ansible-playbook command looks for these directories in the current
+  working directory by default. Other Ansible commands (for example, ansible,
+  ansible-console, and so on) will only look for ``group_vars/`` and ``host_vars/`` in the
+  inventory directory. If you want other commands to load group and host variables from a
+  playbook directory, you must provide the ``--playbook-dir`` option on the command line.
+  If you load inventory files from both the playbook directory and the inventory
+  directory, variables in the playbook directory will override variables set in the
+  inventory directory.
 https://docs.ansible.com/ansible/latest/user_guide/playbook_pathing.html
   Search paths in Ansible.