Which of the following is NOT a common automation system used for patch management?

The correct answer is that Cloudpatch is not a common automation system used for patch management. Chef, Ansible, and Puppet are well-known tools in the realm of DevOps and IT automation, particularly for configuration management and system updates, including patch management.

Chef uses a Ruby-based DSL (Domain Specific Language) for writing system configuration "recipes" that can automate the installation and management of software across servers. Ansible employs a simple YAML-based language for automation tasks and is favored for its agentless architecture, making it easy to manage systems without requiring additional software to be installed. Puppet, similar to Chef, is also widely recognized for its model-driven approach to system configuration, allowing administrators to define the desired state of their systems and automate their maintenance.

In contrast, Cloudpatch is not widely recognized as a standard tool in the industry for automating patch management. This lack of recognition suggests it may not have the same level of adoption or community support as Chef, Ansible, and Puppet, making it the outlier in this context. Understanding the distinction between these tools can help guide decisions when setting up automated patch management systems.