Ansible Automation Platform

Ansible automates Linux/Unix systems with its agentless architecture. It works over SSH without requiring agent installation on target systems.

Ansible Installation

# RHEL/CentOS
sudo dnf install ansible-core

Version check
ansible --version

Inventory Configuration

# inventory.yml
[webservers]
web1.example.com
web2.example.com

[dbservers]
db1.example.com
[all:vars]
ansible_user=ansible
ansible_python_interpreter=/usr/bin/python3

Ad-hoc Commands

# Ping test
ansible all -m ping

Command execution
ansible webservers -m shell -a "uptime"
Package installation
ansible webservers -m dnf -a "name=httpd state=present" -b

Playbook Example

# webserver.yml
---
- name: Web Server Configuration
  hosts: webservers
  become: yes
  tasks:
    - name: Install Nginx
      dnf:
        name: nginx
        state: present
        
- name: Start Nginx
  service:
    name: nginx
    state: started
    enabled: yes</code></pre>

Conclusion
Ansible can configure 100+ servers in minutes. Its idempotent nature allows safe re-execution.