Ansible vs Command vs Shell

Ansible command vs shell module comparison. Learn when to use command vs shell, security best practices, and practical examples.

The Ansible command and shell modules both execute commands on remote nodes but differ in important ways. The command module runs commands directly without a shell interpreter, making it more secure by preventing shell injection attacks, but it cannot use shell features like pipes, redirects, or environment variable expansion. The shell module runs commands through /bin/sh, enabling full shell features including pipes, wildcards, and redirects, but with higher security risk. Best practice is to prefer the command module when possible, use the shell module only when you need shell features, and always prefer dedicated Ansible modules (like copy, template, apt, yum) over both. For idempotency, use creates or removes parameters to skip execution when unnecessary.