echo "# Changelog
## 1.0.0
- Initial release" > my_namespace/my_collection/CHANGELOG.md
Explanation:
Maintaining a changelog provides transparency and version history for users of the collection.

- name: Get command output hosts: localhost
tasks:
- name: Fetch hostname set_fact:
hostname: "{{ lookup('pipe', 'hostname') }}"
- debug:
var: hostname
Explanation:
The pipe lookup plugin executes shell commands and returns their output, enabling dynamic data retrieval during playbook execution.

- name: Remove duplicates hosts: localhost
vars:
items: [1, 2, 2, 3, 3, 4] tasks:
- name: Unique list debug:
var: "{{ items | unique }}"
Explanation:
The unique filter removes duplicate elements, ensuring clean and distinct data.

- name: Validate string hosts: localhost vars:
text: "ansible_123" tasks:
- name: Check format fail:
msg: "String format invalid"
when: not text is match('^ansible_[0-9]+$')
Explanation:
The match filter evaluates whether a string adheres to a regex pattern, enforcing data consistency.

ansible-inventory -i inventory.yml --list
Explanation:
The --list option verifies the inventory syntax and outputs the parsed inventory for debugging.