🚀 Ansible Ad-hoc Commands: A Quick Guide

Ansible is a powerful automation tool that simplifies configuration management, application deployment, and task automation. While playbooks are commonly used for complex automation, Ad-hoc commands provide a quick way to execute tasks on remote systems without writing a playbook.

🔍 What are Ansible Ad-hoc Commands?

Ad-hoc commands are one-time command-line executions using Ansible without creating a playbook. These commands are useful for running quick tasks, such as checking system uptime, managing packages, or restarting services.

🛠 Syntax of an Ad-hoc Command

The basic syntax of an Ansible Ad-hoc command is:

ansible <host-pattern> -m <module> -a “<arguments>”

• <host-pattern>: Specifies the target host or group from the inventory.

• -m <module>: Specifies the Ansible module to use.

• -a "<arguments>": Passes arguments to the module.

⚡ Common Ansible Ad-hoc Commands

✅ 1. Check Connectivity (Ping Module)

ansible all -m ping

This verifies if all managed hosts are reachable.

🖥 2. Gather System Information (Setup Module)

ansible all -m setup

This collects system facts about all hosts.

🏃‍♂️ 3. Execute Shell Commands (Command Module)

ansible all -m command -a “uptime”

This retrieves system uptime from all hosts.

📂 4. Copy Files to Remote Hosts (Copy Module)

ansible all -m copy -a “src=/etc/hosts dest=/tmp/hosts_backup”

This copies the local /etc/hosts file to /tmp/hosts_backup on all remote hosts.

📦 5. Manage Packages (Yum and Apt Modules)

📌 Install a Package (Yum for RHEL-based systems)

ansible all -m yum -a “name=git state=present”

📌 Install a Package (Apt for Debian-based systems)

ansible all -m apt -a “name=git state=present”

This installs the Git package on all target nodes.

🔄 6. Start or Restart a Service (Service Module)

ansible all -m service -a “name=httpd state=restarted”

This restarts the Apache HTTP server.

👤 7. Create a User (User Module)

ansible all -m user -a “name=devops state=present”

This creates a user named devops on all hosts.

🔐 8. Change File Permissions (File Module)

ansible all -m file -a “path=/tmp/hosts_backup mode=0644”

This sets the file permission of /tmp/hosts_backup to 0644.

💾 9. Check Disk Usage (Shell Module)

ansible all -m shell -a “df -h”

This checks the disk usage on all target nodes.

🔄 10. Reboot Remote Hosts (Reboot Module)

ansible all -m reboot

This safely reboots all managed hosts.

❌ 11. Remove a Package (Yum and Apt Modules)

🗑 Remove a Package on RHEL-based Systems

ansible all -m yum -a “name=git state=absent”

🗑 Remove a Package on Debian-based Systems

ansible all -m apt -a “name=git state=absent”

This removes the Git package from all managed hosts.

🔄 12. Change Ownership of a File (File Module)

ansible all -m file -a “path=/tmp/hosts_backup owner=root group=root”

This changes the owner and group of /tmp/hosts_backup to root.

📌 When to Use Ansible Ad-hoc Commands?

• ⚡ Quick administrative tasks

• 🔍 Troubleshooting and debugging

• ⏳ One-time configuration changes

• 🛠 Testing Ansible module functionalities before using them in playbooks

🎯 Conclusion

Ansible Ad-hoc commands are a fast and efficient way to execute tasks across multiple servers. While they are useful for quick operations, playbooks should be used for repeatable and structured automation.

🚀 Want to master Ansible and DevOps? Join our comprehensive DevOps training program and take your automation skills to the next level! 🎯 Join us today!

https://academy.srtechops.com/wp-content/uploads/2025/01/Remainder-App-Technology-Logo.mp4

Devops Multi cloud Training

Choose the training style that fits your schedule — Self-Paced or Live Interactive Sessions. Both include hands-on projects, expert support, and lifetime access.